<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019b22a0-a9ea-79e6-8f53-d9dd5747bba6,g:2d513972-c693-4f7b-a748-21609b34789f-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://owlrocktech.com/role/ConsolidatedStatementsofAssetsandLiabilities" xlink:type="simple" xlink:href="ortic-20251231.xsd#ConsolidatedStatementsofAssetsandLiabilities"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/ConsolidatedStatementsofAssetsandLiabilities" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019b22a0-b809-7f2a-a048-d91dfdc8251e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_019b22a0-b809-7f7a-867c-33121c241790" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019b22a0-b809-7f2a-a048-d91dfdc8251e" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_019b22a0-b809-7f7a-867c-33121c241790" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestReceivable_019b22a0-b809-7038-85c0-99a972ad1dca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019b22a0-b809-7f2a-a048-d91dfdc8251e" xlink:to="loc_us-gaap_InterestReceivable_019b22a0-b809-7038-85c0-99a972ad1dca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_019b22a0-b809-746b-8369-58cb6dcf246a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019b22a0-b809-7f2a-a048-d91dfdc8251e" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_019b22a0-b809-746b-8369-58cb6dcf246a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashHeldInForeignCurrency_019b22a0-b809-7b04-ac1c-b5cb7b834b34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrency"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019b22a0-b809-7f2a-a048-d91dfdc8251e" xlink:to="loc_us-gaap_CashHeldInForeignCurrency_019b22a0-b809-7b04-ac1c-b5cb7b834b34" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b22a0-b809-799b-a7c1-5747ce7a303e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019b22a0-b809-7f2a-a048-d91dfdc8251e" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019b22a0-b809-799b-a7c1-5747ce7a303e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019b22a0-b809-740b-8cab-ec23999d7d21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019b22a0-b809-71aa-9181-be66796da15e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019b22a0-b809-740b-8cab-ec23999d7d21" xlink:to="loc_us-gaap_Liabilities_019b22a0-b809-71aa-9181-be66796da15e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019b22a0-b809-7259-9530-24f0eb223bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019b22a0-b809-740b-8cab-ec23999d7d21" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019b22a0-b809-7259-9530-24f0eb223bb9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019b22a0-b809-70f5-be4e-1ff20d975133" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019b22a0-b809-740b-8cab-ec23999d7d21" xlink:to="loc_us-gaap_StockholdersEquity_019b22a0-b809-70f5-be4e-1ff20d975133" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019b22a0-b809-7d6d-b0e0-293ca348643d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019b22a0-b809-7e75-8433-1f7ebe4fe329" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019b22a0-b809-7d6d-b0e0-293ca348643d" xlink:to="loc_us-gaap_CommonStockValue_019b22a0-b809-7e75-8433-1f7ebe4fe329" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019b22a0-b809-73d9-9970-3afc98246dbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019b22a0-b809-7d6d-b0e0-293ca348643d" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019b22a0-b809-73d9-9970-3afc98246dbf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019b22a0-b809-7634-bfc7-1049dff16564" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019b22a0-b809-7d6d-b0e0-293ca348643d" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019b22a0-b809-7634-bfc7-1049dff16564" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019b22a0-b809-73dc-adf0-839d5a128b48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_LongTermDebt_019b22a0-b809-73dc-adf0-839d5a128b48" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionPayable_019b22a0-b809-742f-99e6-27a653921355" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionPayable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_DistributionPayable_019b22a0-b809-742f-99e6-27a653921355" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_ShareRepurchaseProgramTenderOfferPayable_019b22a0-b809-7bd3-bee1-e012f3c0fc24" xlink:href="ortic-20251231.xsd#ortic_ShareRepurchaseProgramTenderOfferPayable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_ortic_ShareRepurchaseProgramTenderOfferPayable_019b22a0-b809-7bd3-bee1-e012f3c0fc24" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementFeePayable_019b22a0-b809-7d86-b762-dce24fe07b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_ManagementFeePayable_019b22a0-b809-7d86-b762-dce24fe07b1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncentiveFeePayable_019b22a0-b809-7301-a820-43725504b5a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_IncentiveFeePayable_019b22a0-b809-7301-a820-43725504b5a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PayableInvestmentPurchase_019b22a0-b809-712f-bff2-7d8c5b47dbfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PayableInvestmentPurchase"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_PayableInvestmentPurchase_019b22a0-b809-712f-bff2-7d8c5b47dbfe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019b22a0-b809-76fa-982e-d4fadd4524ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilities"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_OtherLiabilities_019b22a0-b809-76fa-982e-d4fadd4524ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019b22a0-b809-7a16-bc5c-c6331cfcee13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019b22a0-b809-7ca1-86a7-6cb69b7e97e0" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019b22a0-b809-7a16-bc5c-c6331cfcee13" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/ConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="ortic-20251231.xsd#ConsolidatedStatementsofOperations"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/ConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_019b22a0-b809-73d7-a995-72544630807b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_019b22a0-b809-7374-aa58-318af1b930b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesRealizedGainLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_019b22a0-b809-73d7-a995-72544630807b" xlink:to="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_019b22a0-b809-7374-aa58-318af1b930b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_019b22a0-b809-74c2-bebf-1a8c4fbd5744" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_019b22a0-b809-73d7-a995-72544630807b" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_019b22a0-b809-74c2-bebf-1a8c4fbd5744" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b22a0-b809-75e3-b2ca-cf246d7be3d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-774c-9d31-0b877b25ae1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019b22a0-b809-75e3-b2ca-cf246d7be3d3" xlink:to="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-774c-9d31-0b877b25ae1f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax_019b22a0-b809-7127-bf58-036832a5d4f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019b22a0-b809-75e3-b2ca-cf246d7be3d3" xlink:to="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax_019b22a0-b809-7127-bf58-036832a5d4f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax_019b22a0-b809-71e0-8a16-a4fd1f3e7156" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation_019b22a0-b809-70a6-b5c6-47bbb7d08372" xlink:href="ortic-20251231.xsd#ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax_019b22a0-b809-71e0-8a16-a4fd1f3e7156" xlink:to="loc_ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation_019b22a0-b809-70a6-b5c6-47bbb7d08372" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_019b22a0-b809-753a-bc37-a2c73bd302a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionOperatingAfterTax_019b22a0-b809-71e0-8a16-a4fd1f3e7156" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_019b22a0-b809-753a-bc37-a2c73bd302a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_019b22a0-b809-7de7-810d-1f566dba20dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-7f6d-a5a8-df2ed6c16726" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentIncome_019b22a0-b809-7de7-810d-1f566dba20dc" xlink:to="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-7f6d-a5a8-df2ed6c16726" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-7c39-bd52-599cae17f1d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentIncome_019b22a0-b809-7de7-810d-1f566dba20dc" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-7c39-bd52-599cae17f1d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation_019b22a0-b809-7d69-874f-bc322ffe2f36" xlink:href="ortic-20251231.xsd#ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_019b22a0-b809-7650-bbb9-9f89fca8f55b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation_019b22a0-b809-7d69-874f-bc322ffe2f36" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_019b22a0-b809-7650-bbb9-9f89fca8f55b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_019b22a0-b809-7dac-9f76-44e256efceb5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_NetChangeInUnrealizedGainsLossesOnInvestmentsAndForeignCurrencyTranslation_019b22a0-b809-7d69-874f-bc322ffe2f36" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_019b22a0-b809-7dac-9f76-44e256efceb5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-74c3-9af7-dbb48a0d6132" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_019b22a0-b809-7aa0-af0d-0168b0669e73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-74c3-9af7-dbb48a0d6132" xlink:to="loc_us-gaap_NetInvestmentIncome_019b22a0-b809-7aa0-af0d-0168b0669e73" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_019b22a0-b809-704c-ae1e-acda137b516c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-74c3-9af7-dbb48a0d6132" xlink:to="loc_us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_019b22a0-b809-704c-ae1e-acda137b516c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_OfferingCosts_019b22a0-b809-7348-a4df-a5b2eb92787c" xlink:href="ortic-20251231.xsd#ortic_OfferingCosts"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_ortic_OfferingCosts_019b22a0-b809-7348-a4df-a5b2eb92787c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManagementFeeExpense_019b22a0-b809-7d40-abff-b6510afdae9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_ManagementFeeExpense_019b22a0-b809-7d40-abff-b6510afdae9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_CapitalGainsBasedIncentiveFeeReversal_019b22a0-b809-790b-afce-5763b8bd8287" xlink:href="ortic-20251231.xsd#ortic_CapitalGainsBasedIncentiveFeeReversal"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_ortic_CapitalGainsBasedIncentiveFeeReversal_019b22a0-b809-790b-afce-5763b8bd8287" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncentiveFeeExpense_019b22a0-b809-7155-95d7-96b49a797649" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_IncentiveFeeExpense_019b22a0-b809-7155-95d7-96b49a797649" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019b22a0-b809-7123-85a6-af7b0e6b74b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_ProfessionalFees_019b22a0-b809-7123-85a6-af7b0e6b74b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpenseDirectorsFees_019b22a0-b809-732a-8086-e78ab3b6995f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpenseDirectorsFees"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_NoninterestExpenseDirectorsFees_019b22a0-b809-732a-8086-e78ab3b6995f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyShareholderServiceFeeExpense_019b22a0-b809-71f2-9cd3-fa812e1d7bd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyShareholderServiceFeeExpense"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_InvestmentCompanyShareholderServiceFeeExpense_019b22a0-b809-71f2-9cd3-fa812e1d7bd0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherGeneralAndAdministrativeExpense_019b22a0-b809-7cdc-acc1-f01909aee2ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_OtherGeneralAndAdministrativeExpense_019b22a0-b809-7cdc-acc1-f01909aee2ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_019b22a0-b809-732e-a340-5493d7ba7901" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentIncomeInvestmentExpense_019b22a0-b809-778f-b5c5-3b9fee9d9219" xlink:to="loc_us-gaap_InterestExpense_019b22a0-b809-732e-a340-5493d7ba7901" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-73dd-b508-4842646785d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOperatingPaidInKind_019b22a0-b809-715c-9fd2-764bec629f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInKind"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-73dd-b508-4842646785d7" xlink:to="loc_us-gaap_InterestIncomeOperatingPaidInKind_019b22a0-b809-715c-9fd2-764bec629f8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeOperatingPaidInKind_019b22a0-b809-7cf6-aae7-7abf4d912958" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInKind"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-73dd-b508-4842646785d7" xlink:to="loc_us-gaap_DividendIncomeOperatingPaidInKind_019b22a0-b809-7cf6-aae7-7abf4d912958" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeOperatingPaidInCash_019b22a0-b809-78b6-a079-811da95a5a56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInCash"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-73dd-b508-4842646785d7" xlink:to="loc_us-gaap_DividendIncomeOperatingPaidInCash_019b22a0-b809-78b6-a079-811da95a5a56" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome_019b22a0-b809-7198-893e-59c66aa6366b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncome"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-73dd-b508-4842646785d7" xlink:to="loc_us-gaap_OtherIncome_019b22a0-b809-7198-893e-59c66aa6366b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOperatingPaidInCash_019ca021-c1ab-79e4-8d26-43a615c19a77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInCash"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossInvestmentIncomeOperating_019b22a0-b809-73dd-b508-4842646785d7" xlink:to="loc_us-gaap_InterestIncomeOperatingPaidInCash_019ca021-c1ab-79e4-8d26-43a615c19a77" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/ConsolidatedStatementsofChangesinNetAssets" xlink:type="simple" xlink:href="ortic-20251231.xsd#ConsolidatedStatementsofChangesinNetAssets"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/ConsolidatedStatementsofChangesinNetAssets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b809-7443-98c2-3d254d26946d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityPeriodIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7576-b8ca-1fae9ae621e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b809-7443-98c2-3d254d26946d" xlink:to="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7576-b8ca-1fae9ae621e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDividendDistribution_019b22a0-b809-76f7-aede-191cdfd98457" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b809-7443-98c2-3d254d26946d" xlink:to="loc_us-gaap_InvestmentCompanyDividendDistribution_019b22a0-b809-76f7-aede-191cdfd98457" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-73be-9482-8776ef4fea65" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b809-7443-98c2-3d254d26946d" xlink:to="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-73be-9482-8776ef4fea65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-7582-b767-50d41d235df5" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019b22a0-b809-74f6-ab1f-1eb17950ba7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-7582-b767-50d41d235df5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019b22a0-b809-74f6-ab1f-1eb17950ba7a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019b22a0-b809-7e53-b34e-a6c9d9906a98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-7582-b767-50d41d235df5" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019b22a0-b809-7e53-b34e-a6c9d9906a98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_019b22a0-b809-7e6c-ac77-b6e3816eeab2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-7582-b767-50d41d235df5" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_019b22a0-b809-7e6c-ac77-b6e3816eeab2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockholdersEquityShareTransferBetweenClassesValue_019b22a0-b809-7d31-8ce3-39f781fa9eed" xlink:href="ortic-20251231.xsd#ortic_StockholdersEquityShareTransferBetweenClassesValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyCapitalTransactionsIncreaseDecrease_019b22a0-b809-7582-b767-50d41d235df5" xlink:to="loc_ortic_StockholdersEquityShareTransferBetweenClassesValue_019b22a0-b809-7d31-8ce3-39f781fa9eed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7f37-af05-7d5447fb53f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-70ab-9611-f4341ef5c69b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7f37-af05-7d5447fb53f0" xlink:to="loc_us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_019b22a0-b809-70ab-9611-f4341ef5c69b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_019b22a0-b809-7ecf-89bd-40dbbedcc5c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7f37-af05-7d5447fb53f0" xlink:to="loc_us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_019b22a0-b809-7ecf-89bd-40dbbedcc5c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_019b22a0-b809-7824-9ee2-490a6b08a389" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7f37-af05-7d5447fb53f0" xlink:to="loc_us-gaap_RealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_019b22a0-b809-7824-9ee2-490a6b08a389" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="ortic-20251231.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019b22a0-b809-7d15-9e30-4e273e1faa33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7b15-a743-9e334dcc96cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019b22a0-b809-7d15-9e30-4e273e1faa33" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7b15-a743-9e334dcc96cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-782d-be94-000e4931859a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019b22a0-b809-7d15-9e30-4e273e1faa33" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-782d-be94-000e4931859a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_019b22a0-b809-7117-b01d-6e91bd07b915" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_019b22a0-b809-7117-b01d-6e91bd07b915" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_019b22a0-b809-7199-93e9-b1461ed3f5d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_RepaymentsOfDebt_019b22a0-b809-7199-93e9-b1461ed3f5d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019b22a0-b809-7f2c-8792-17c9b185322a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019b22a0-b809-7f2c-8792-17c9b185322a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019b22a0-b809-75f5-bd4c-7062f4189af0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019b22a0-b809-75f5-bd4c-7062f4189af0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019b22a0-b809-7d2a-a432-429e05895d84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019b22a0-b809-7d2a-a432-429e05895d84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_019b22a0-b809-7d2c-ab1b-f9c4e8c0d6c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_019b22a0-b809-7d2c-ab1b-f9c4e8c0d6c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019b22a0-b809-7fe6-9d70-d481c9396140" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019b22a0-b809-7048-95bc-9eab73779e3e" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019b22a0-b809-7fe6-9d70-d481c9396140" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7ab9-8420-ddc61145757d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_NetIncomeLoss_019b22a0-b809-7ab9-8420-ddc61145757d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_019b22a0-b809-7c20-9a7a-5e9acaf3cd65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_019b22a0-b809-7c20-9a7a-5e9acaf3cd65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_019b22a0-b809-7394-92cb-c768394e1936" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_019b22a0-b809-7394-92cb-c768394e1936" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019b22a0-b809-70b9-a2de-687d0a1ae159" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019b22a0-b809-70b9-a2de-687d0a1ae159" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InterestIncomeOperatingPaidInKindCapitalized_019b22a0-b809-773d-8cc2-8044f4afd515" xlink:href="ortic-20251231.xsd#ortic_InterestIncomeOperatingPaidInKindCapitalized"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_ortic_InterestIncomeOperatingPaidInKindCapitalized_019b22a0-b809-773d-8cc2-8044f4afd515" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_DividendIncomeOperatingPaidInKindCapitalized_019b22a0-b809-7300-93de-36fb18386230" xlink:href="ortic-20251231.xsd#ortic_DividendIncomeOperatingPaidInKindCapitalized"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_ortic_DividendIncomeOperatingPaidInKindCapitalized_019b22a0-b809-7300-93de-36fb18386230" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_019b22a0-b809-7242-af24-2740d8a486e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_019b22a0-b809-7242-af24-2740d8a486e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019b22a0-b809-7bc9-921f-2f219a361b6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019b22a0-b809-7bc9-921f-2f219a361b6d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_019b22a0-b809-774e-8973-7b9aafedba43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesRealizedGainLoss"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_DebtAndEquitySecuritiesRealizedGainLoss_019b22a0-b809-774e-8973-7b9aafedba43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_ForeignCurrencyTransactionGainLossRealizedNoncash_019b22a0-b809-7bdd-850b-f1256c733161" xlink:href="ortic-20251231.xsd#ortic_ForeignCurrencyTransactionGainLossRealizedNoncash"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_ortic_ForeignCurrencyTransactionGainLossRealizedNoncash_019b22a0-b809-7bdd-850b-f1256c733161" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019b22a0-b809-7256-b83c-82202fce5ee0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019b22a0-b809-7256-b83c-82202fce5ee0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDeferredCharges_019b22a0-b809-741e-802e-924516348b5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_AmortizationOfDeferredCharges_019b22a0-b809-741e-802e-924516348b5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_019b22a0-b809-7e07-9a75-cff0c66ec0df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_019b22a0-b809-7e07-9a75-cff0c66ec0df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019b22a0-b809-73cb-8907-db1a43c04281" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019b22a0-b809-73cb-8907-db1a43c04281" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInManagementFeePayable_019b22a0-b809-7ac0-9c43-8880cbf346b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInManagementFeePayable"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseInManagementFeePayable_019b22a0-b809-7ac0-9c43-8880cbf346b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_019b22a0-b809-7460-9060-9363cec4eb80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseDueFromAffiliates"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseDueFromAffiliates_019b22a0-b809-7460-9060-9363cec4eb80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayable_019b22a0-b809-7cde-b420-b5471c1e8bd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayable"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseInIncentiveFeePayable_019b22a0-b809-7cde-b420-b5471c1e8bd0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased_019b22a0-b809-7c46-880e-112c8414a129" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased_019b22a0-b809-7c46-880e-112c8414a129" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_IncreaseDecreaseInPayableToAdviser_019b22a0-b809-7304-a972-5f26edf5322d" xlink:href="ortic-20251231.xsd#ortic_IncreaseDecreaseInPayableToAdviser"/>
    <link:calculationArc order="19" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_ortic_IncreaseDecreaseInPayableToAdviser_019b22a0-b809-7304-a972-5f26edf5322d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019b22a0-b809-7c01-a8f0-5e7eeb2f43d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <link:calculationArc order="20" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019b22a0-b809-7c01-a8f0-5e7eeb2f43d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_ForeignCurrencyTransactionGainLossUnrealizedNoncash_019c6bab-c8f3-759c-9140-55ac403f29e2" xlink:href="ortic-20251231.xsd#ortic_ForeignCurrencyTransactionGainLossUnrealizedNoncash"/>
    <link:calculationArc order="21" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019b22a0-b809-7dd6-8155-cff704ecbd66" xlink:to="loc_ortic_ForeignCurrencyTransactionGainLossUnrealizedNoncash_019c6bab-c8f3-759c-9140-55ac403f29e2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/SignificantAccountingPoliciesScheduleofInvestmentIncomeDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#SignificantAccountingPoliciesScheduleofInvestmentIncomeDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/SignificantAccountingPoliciesScheduleofInvestmentIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperatingPaidInKind_019b22a0-b809-71e3-950b-be479d4f8478" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingPaidInKind"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendIncomeOperatingPaidInKind_019b22a0-b809-7f40-a3b9-952179a200c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInKind"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingPaidInKind_019b22a0-b809-71e3-950b-be479d4f8478" xlink:to="loc_us-gaap_DividendIncomeOperatingPaidInKind_019b22a0-b809-7f40-a3b9-952179a200c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOperatingPaidInKind_019b22a0-b809-7b01-8be9-ec318b6b2887" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInKind"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingPaidInKind_019b22a0-b809-71e3-950b-be479d4f8478" xlink:to="loc_us-gaap_InterestIncomeOperatingPaidInKind_019b22a0-b809-7b01-8be9-ec318b6b2887" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/DebtScheduleofOutstandingDebtObligationsDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#DebtScheduleofOutstandingDebtObligationsDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/DebtScheduleofOutstandingDebtObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019b22a0-b8b5-76d7-9133-346e1199dd4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019b22a0-b8b5-74e2-ad7d-ae496c0ef902" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019b22a0-b8b5-76d7-9133-346e1199dd4c" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019b22a0-b8b5-74e2-ad7d-ae496c0ef902" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019b22a0-b8b5-7e9d-a81f-538fec922914" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019b22a0-b8b5-76d7-9133-346e1199dd4c" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019b22a0-b8b5-7e9d-a81f-538fec922914" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/DebtScheduleofComponentsofInterestExpenseDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#DebtScheduleofComponentsofInterestExpenseDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/DebtScheduleofComponentsofInterestExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InterestExpenseExcludingFinancingFees_019b22a0-b8b5-7387-ab69-225e6e089e18" xlink:href="ortic-20251231.xsd#ortic_InterestExpenseExcludingFinancingFees"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019b22a0-b8b5-786e-ad96-88166d2b9ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InterestExpenseExcludingFinancingFees_019b22a0-b8b5-7387-ab69-225e6e089e18" xlink:to="loc_us-gaap_InterestExpenseDebt_019b22a0-b8b5-786e-ad96-88166d2b9ae9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019b22a0-b8b5-7164-bf19-54b9e593b987" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InterestExpenseExcludingFinancingFees_019b22a0-b8b5-7387-ab69-225e6e089e18" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019b22a0-b8b5-7164-bf19-54b9e593b987" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/DebtScheduleofMaturityofContractualObligationsDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#DebtScheduleofMaturityofContractualObligationsDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/DebtScheduleofMaturityofContractualObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019ca006-0d05-72a5-9ad4-fddeec307432" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_019ca006-0d05-7b1d-b969-7c109e7f8b65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_019ca006-0d05-72a5-9ad4-fddeec307432" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_019ca006-0d05-7b1d-b969-7c109e7f8b65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_LongTermDebtMaturityYearOneToThree_019ca006-0d05-7029-9843-5640d19ad65c" xlink:href="ortic-20251231.xsd#ortic_LongTermDebtMaturityYearOneToThree"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_019ca006-0d05-72a5-9ad4-fddeec307432" xlink:to="loc_ortic_LongTermDebtMaturityYearOneToThree_019ca006-0d05-7029-9843-5640d19ad65c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_LongTermDebtMaturityYearThreeToFive_019ca006-0d05-7905-b46e-43d3364f3b0a" xlink:href="ortic-20251231.xsd#ortic_LongTermDebtMaturityYearThreeToFive"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_019ca006-0d05-72a5-9ad4-fddeec307432" xlink:to="loc_ortic_LongTermDebtMaturityYearThreeToFive_019ca006-0d05-7905-b46e-43d3364f3b0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_019ca006-0d05-7a46-946d-4f7030edc930" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_019ca006-0d05-72a5-9ad4-fddeec307432" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_019ca006-0d05-7a46-946d-4f7030edc930" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/DerivativeInstrumentsScheduleofDerivativeInstrumentsGainLossDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#DerivativeInstrumentsScheduleofDerivativeInstrumentsGainLossDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/DerivativeInstrumentsScheduleofDerivativeInstrumentsGainLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_019c6bc4-2757-7e12-96cf-4809bbfa7e78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_019c6bc4-2757-7e0c-8194-6f27490f0782" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_019c6bc4-2757-7e12-96cf-4809bbfa7e78" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_019c6bc4-2757-7e0c-8194-6f27490f0782" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019c6bc4-2757-7018-90fa-9ba9e1555896" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealizedAndUnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_019c6bc4-2757-7e12-96cf-4809bbfa7e78" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019c6bc4-2757-7018-90fa-9ba9e1555896" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/CommitmentsandContingenciesScheduleofExpensesPursuanttotheExpenseDeferralAgreementDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#CommitmentsandContingenciesScheduleofExpensesPursuanttotheExpenseDeferralAgreementDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/CommitmentsandContingenciesScheduleofExpensesPursuanttotheExpenseDeferralAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ortic_CostsAndExpensesAndOrganizationAndOfferingCostsCumulative_019b22a0-b8b6-7640-8ee1-5cf0df660e4d" xlink:href="ortic-20251231.xsd#ortic_CostsAndExpensesAndOrganizationAndOfferingCostsCumulative"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_CostAndExpensesCumulative_019b22a0-b8b6-7dac-83c8-4666c1cb5c35" xlink:href="ortic-20251231.xsd#ortic_CostAndExpensesCumulative"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_CostsAndExpensesAndOrganizationAndOfferingCostsCumulative_019b22a0-b8b6-7640-8ee1-5cf0df660e4d" xlink:to="loc_ortic_CostAndExpensesCumulative_019b22a0-b8b6-7dac-83c8-4666c1cb5c35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_OrganizationAndOfferingCostsCumulative_019b22a0-b8b6-7359-9d3f-1a77b39aafb5" xlink:href="ortic-20251231.xsd#ortic_OrganizationAndOfferingCostsCumulative"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_CostsAndExpensesAndOrganizationAndOfferingCostsCumulative_019b22a0-b8b6-7640-8ee1-5cf0df660e4d" xlink:to="loc_ortic_OrganizationAndOfferingCostsCumulative_019b22a0-b8b6-7359-9d3f-1a77b39aafb5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/CommitmentsandContingenciesScheduleofNumberofInstallmentsandtheAmountDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#CommitmentsandContingenciesScheduleofNumberofInstallmentsandtheAmountDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/CommitmentsandContingenciesScheduleofNumberofInstallmentsandtheAmountDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_019b22a0-b8b6-758b-a732-cb50e3665d10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019b22a0-b8b6-7d5d-b7de-7419566b966d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingCostsAndExpenses_019b22a0-b8b6-758b-a732-cb50e3665d10" xlink:to="loc_us-gaap_CostsAndExpenses_019b22a0-b8b6-7d5d-b7de-7419566b966d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_OrganizationAndOfferingCosts_019b22a0-b8b6-7f0e-9630-f1f2c95e677a" xlink:href="ortic-20251231.xsd#ortic_OrganizationAndOfferingCosts"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingCostsAndExpenses_019b22a0-b8b6-758b-a732-cb50e3665d10" xlink:to="loc_ortic_OrganizationAndOfferingCosts_019b22a0-b8b6-7f0e-9630-f1f2c95e677a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/NetAssetsScheduleofCommonStockTransactionbyClassDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#NetAssetsScheduleofCommonStockTransactionbyClassDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/NetAssetsScheduleofCommonStockTransactionbyClassDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7b61-a216-36286abd1587" xlink:href="ortic-20251231.xsd#ortic_StockholdersEquityPeriodGrossIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019b22a0-b8b6-7271-8a8a-6c4ff35b196a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7b61-a216-36286abd1587" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019b22a0-b8b6-7271-8a8a-6c4ff35b196a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_019b22a0-b8b6-7f4a-9203-7dad40b681ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7b61-a216-36286abd1587" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_019b22a0-b8b6-7f4a-9203-7dad40b681ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019b22a0-b8b6-71af-ba3e-31092050374c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7b61-a216-36286abd1587" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019b22a0-b8b6-71af-ba3e-31092050374c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockholdersEquityShareTransferBetweenClassesValue_019b22a0-b8b6-71fc-adbe-4782c4e35abd" xlink:href="ortic-20251231.xsd#ortic_StockholdersEquityShareTransferBetweenClassesValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7b61-a216-36286abd1587" xlink:to="loc_ortic_StockholdersEquityShareTransferBetweenClassesValue_019b22a0-b8b6-71fc-adbe-4782c4e35abd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b8b6-76ff-8267-1699570fc335" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityPeriodIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockSalesLoadChargeDuringPeriodValue_019b22a0-b8b6-7d0f-abdd-a41f5f38ed25" xlink:href="ortic-20251231.xsd#ortic_StockSalesLoadChargeDuringPeriodValue"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b8b6-76ff-8267-1699570fc335" xlink:to="loc_ortic_StockSalesLoadChargeDuringPeriodValue_019b22a0-b8b6-7d0f-abdd-a41f5f38ed25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7e51-9f1d-53b4614f30d8" xlink:href="ortic-20251231.xsd#ortic_StockholdersEquityPeriodGrossIncreaseDecrease"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityPeriodIncreaseDecrease_019b22a0-b8b6-76ff-8267-1699570fc335" xlink:to="loc_ortic_StockholdersEquityPeriodGrossIncreaseDecrease_019b22a0-b8b6-7e51-9f1d-53b4614f30d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-7d37-b246-5eda89deaa24" xlink:href="ortic-20251231.xsd#ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019b22a0-b8b6-7c3f-b35d-b0463bf5da78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-7d37-b246-5eda89deaa24" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019b22a0-b8b6-7c3f-b35d-b0463bf5da78" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_019b22a0-b8b6-7748-ab44-6d20452d8030" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-7d37-b246-5eda89deaa24" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_019b22a0-b8b6-7748-ab44-6d20452d8030" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019b22a0-b8b6-7514-b923-0c845518d753" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-7d37-b246-5eda89deaa24" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019b22a0-b8b6-7514-b923-0c845518d753" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockholdersEquityShareTransferBetweenClassesShares_019b22a0-b8b6-731a-95ac-4bcdc49876a3" xlink:href="ortic-20251231.xsd#ortic_StockholdersEquityShareTransferBetweenClassesShares"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-7d37-b246-5eda89deaa24" xlink:to="loc_ortic_StockholdersEquityShareTransferBetweenClassesShares_019b22a0-b8b6-731a-95ac-4bcdc49876a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_019b22a0-b8b6-768b-9ea5-47a6d3e95adb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-73d0-8b84-f691c9f760f0" xlink:href="ortic-20251231.xsd#ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_019b22a0-b8b6-768b-9ea5-47a6d3e95adb" xlink:to="loc_ortic_StockIssuedDuringPeriodSharesPeriodGrossIncreaseDecrease_019b22a0-b8b6-73d0-8b84-f691c9f760f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_StockSalesLoadChargeDuringPeriodShares_019b22a0-b8b6-719b-aee3-fe898796d8a1" xlink:href="ortic-20251231.xsd#ortic_StockSalesLoadChargeDuringPeriodShares"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_019b22a0-b8b6-768b-9ea5-47a6d3e95adb" xlink:to="loc_ortic_StockSalesLoadChargeDuringPeriodShares_019b22a0-b8b6-719b-aee3-fe898796d8a1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/NetAssetsScheduleofSourceofCashDistributionsDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#NetAssetsScheduleofSourceofCashDistributionsDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/NetAssetsScheduleofSourceofCashDistributionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_019b22a0-b8b6-7685-a741-f4a06f7b1d09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionToShareholdersPerShare"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentIncomeGrossOfServicingFeePerShare_019b22a0-b8b6-75b6-bcb3-e83d49b1cb80" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentIncomeGrossOfServicingFeePerShare"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_019b22a0-b8b6-7685-a741-f4a06f7b1d09" xlink:to="loc_ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentIncomeGrossOfServicingFeePerShare_019b22a0-b8b6-75b6-bcb3-e83d49b1cb80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersNetRealizedGainOnInvestmentsPerShare_019b22a0-b8b6-7099-ae37-d1004b14a965" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersNetRealizedGainOnInvestmentsPerShare"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_019b22a0-b8b6-7685-a741-f4a06f7b1d09" xlink:to="loc_ortic_InvestmentCompanyDistributionToShareholdersNetRealizedGainOnInvestmentsPerShare_019b22a0-b8b6-7099-ae37-d1004b14a965" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionInExcessOfUndistributedNetIncomeToShareholdersPerShare_019b22a0-b8b6-7651-9590-fecdf6909047" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionInExcessOfUndistributedNetIncomeToShareholdersPerShare"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_019b22a0-b8b6-7685-a741-f4a06f7b1d09" xlink:to="loc_ortic_InvestmentCompanyDistributionInExcessOfUndistributedNetIncomeToShareholdersPerShare_019b22a0-b8b6-7651-9590-fecdf6909047" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersTotalPercentage_019b22a0-b8b6-7494-8d16-741b7ed22872" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersTotalPercentage"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentIncomePercentage_019b22a0-b8b6-738e-bc89-77493213408f" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentIncomePercentage"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyDistributionToShareholdersTotalPercentage_019b22a0-b8b6-7494-8d16-741b7ed22872" xlink:to="loc_ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentIncomePercentage_019b22a0-b8b6-738e-bc89-77493213408f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentGainLossOnInvestmentsPercentage_019b22a0-b8b6-785f-8bd2-f039368e586b" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentGainLossOnInvestmentsPercentage"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyDistributionToShareholdersTotalPercentage_019b22a0-b8b6-7494-8d16-741b7ed22872" xlink:to="loc_ortic_InvestmentCompanyDistributionToShareholdersFromNetInvestmentGainLossOnInvestmentsPercentage_019b22a0-b8b6-785f-8bd2-f039368e586b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersFromDistributionsInExcessOfUndistributedNetInvestmentIncomePercentage_019b22a0-b8b6-7ef4-beff-eb1a55eac28a" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersFromDistributionsInExcessOfUndistributedNetInvestmentIncomePercentage"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyDistributionToShareholdersTotalPercentage_019b22a0-b8b6-7494-8d16-741b7ed22872" xlink:to="loc_ortic_InvestmentCompanyDistributionToShareholdersFromDistributionsInExcessOfUndistributedNetInvestmentIncomePercentage_019b22a0-b8b6-7ef4-beff-eb1a55eac28a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyDividendDistribution_019b22a0-b8b6-7071-b3df-082c5e33dff3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionsInExcessOfUndistributedNetInvestmentIncome_019b22a0-b8b6-7f6f-98e4-0cba914a017f" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionsInExcessOfUndistributedNetInvestmentIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyDividendDistribution_019b22a0-b8b6-7071-b3df-082c5e33dff3" xlink:to="loc_ortic_InvestmentCompanyDistributionsInExcessOfUndistributedNetInvestmentIncome_019b22a0-b8b6-7f6f-98e4-0cba914a017f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionLongTermCapitalGainLoss_019b22a0-b8b6-7030-be88-7eddf27083c8" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionLongTermCapitalGainLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyDividendDistribution_019b22a0-b8b6-7071-b3df-082c5e33dff3" xlink:to="loc_ortic_InvestmentCompanyDistributionLongTermCapitalGainLoss_019b22a0-b8b6-7030-be88-7eddf27083c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyShareholderDistributionNetInvestmentIncomeGrossOfServicingFee_019b22a0-b8b6-75c2-b36a-c215a076e684" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyShareholderDistributionNetInvestmentIncomeGrossOfServicingFee"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyDividendDistribution_019b22a0-b8b6-7071-b3df-082c5e33dff3" xlink:to="loc_ortic_InvestmentCompanyShareholderDistributionNetInvestmentIncomeGrossOfServicingFee_019b22a0-b8b6-75c2-b36a-c215a076e684" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/IncomeTaxesTablesScheduleofUSFederalExciseTaxDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#IncomeTaxesTablesScheduleofUSFederalExciseTaxDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/IncomeTaxesTablesScheduleofUSFederalExciseTaxDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyTaxableIncomeBeforeDeductions_019b22a0-b8b6-70e6-a8bd-f989006eb301" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyTaxableIncomeBeforeDeductions"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentTaxBasisReconciliationNetUnrealizedGainLossOnInvestmentsIncreaseDecreaseInTaxableIncome_019b22a0-b8b6-7866-86cc-70be3aa9a162" xlink:href="ortic-20251231.xsd#ortic_InvestmentTaxBasisReconciliationNetUnrealizedGainLossOnInvestmentsIncreaseDecreaseInTaxableIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyTaxableIncomeBeforeDeductions_019b22a0-b8b6-70e6-a8bd-f989006eb301" xlink:to="loc_ortic_InvestmentTaxBasisReconciliationNetUnrealizedGainLossOnInvestmentsIncreaseDecreaseInTaxableIncome_019b22a0-b8b6-7866-86cc-70be3aa9a162" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentTaxBasisReconciliationExciseTaxIncreaseDecreaseInTaxableIncome_019b22a0-b8b6-71f5-a347-2165823772d5" xlink:href="ortic-20251231.xsd#ortic_InvestmentTaxBasisReconciliationExciseTaxIncreaseDecreaseInTaxableIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyTaxableIncomeBeforeDeductions_019b22a0-b8b6-70e6-a8bd-f989006eb301" xlink:to="loc_ortic_InvestmentTaxBasisReconciliationExciseTaxIncreaseDecreaseInTaxableIncome_019b22a0-b8b6-71f5-a347-2165823772d5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentTaxBasisReconciliationOtherReconcilingItemsIncreaseDecreaseInTaxableIncome_019b22a0-b8b6-7bc9-ad9b-ea91ead8d4ea" xlink:href="ortic-20251231.xsd#ortic_InvestmentTaxBasisReconciliationOtherReconcilingItemsIncreaseDecreaseInTaxableIncome"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyTaxableIncomeBeforeDeductions_019b22a0-b8b6-70e6-a8bd-f989006eb301" xlink:to="loc_ortic_InvestmentTaxBasisReconciliationOtherReconcilingItemsIncreaseDecreaseInTaxableIncome_019b22a0-b8b6-7bc9-ad9b-ea91ead8d4ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b22a0-b8b6-7384-8561-3281a3beb8d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ortic_InvestmentCompanyTaxableIncomeBeforeDeductions_019b22a0-b8b6-70e6-a8bd-f989006eb301" xlink:to="loc_us-gaap_NetIncomeLoss_019b22a0-b8b6-7384-8561-3281a3beb8d0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://owlrocktech.com/role/FinancialHighlightsDetails" xlink:type="simple" xlink:href="ortic-20251231.xsd#FinancialHighlightsDetails"/>
  <link:calculationLink xlink:role="http://owlrocktech.com/role/FinancialHighlightsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyNetAssetValuePerSharePeriodIncreaseDecrease_019b22a0-b8b6-72b6-9766-8d2ab2903d85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNetAssetValuePerSharePeriodIncreaseDecrease"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_019b22a0-b8b6-7058-b4eb-c159dcc9097c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyNetAssetValuePerSharePeriodIncreaseDecrease_019b22a0-b8b6-72b6-9766-8d2ab2903d85" xlink:to="loc_us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_019b22a0-b8b6-7058-b4eb-c159dcc9097c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ortic_InvestmentCompanyDistributionToShareholdersPeriodIncreaseDecrease_019b22a0-b8b6-74c8-b562-779d17babe89" xlink:href="ortic-20251231.xsd#ortic_InvestmentCompanyDistributionToShareholdersPeriodIncreaseDecrease"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentCompanyNetAssetValuePerSharePeriodIncreaseDecrease_019b22a0-b8b6-72b6-9766-8d2ab2903d85" xlink:to="loc_ortic_InvestmentCompanyDistributionToShareholdersPeriodIncreaseDecrease_019b22a0-b8b6-74c8-b562-779d17babe89" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
