ALCOA CORPORATION
POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that I, the undersigned director and/or
officer of Alcoa Corporation, a Delaware corporation (the "Company"), hereby
constitute and appoint Jeffrey D. Heeter, Marissa P. Earnest, Eryn F. Correa,
Mary A. Vogel and any Assistant Secretary of the Company, and each of them, my
true and lawful attorneys-in-fact and agents, with full power to act, together
or each without the other, with full power of substitution and resubstitution,
for me and in my name, place and stead, in any and all capacities, to execute
and file for and on behalf of the undersigned (i) any reports on Forms 3, 4 and
5 (including any amendments thereto and any successors to such Forms) with
respect to ownership acquisition or disposition of securities of the Company
that the undersigned may be required to file with the U.S. Securities and
Exchange Commission (the "SEC") in accordance with Section 16(a) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the rules
promulgated thereunder, (ii) any voluntary filings under Section 16(a) of the
Exchange Act, (iii) to request electronic filing codes from the SEC by filing
the Form ID (including amendments thereto) and any other documents necessary or
appropriate to obtain codes and passwords enabling the undersigned to file such
reports electronically, (iv) any documents or reports that may be required under
SEC Rule 144 to permit the undersigned to sell Company common stock without
registration under the Securities Act of 1933, as amended (the "Securities Act")
in reliance on Rule 144 as amended from time to time, or (v) take any other
action of any type whatsoever in connection with the foregoing which, in the
opinion of such attorneys-in-fact, may be of benefit to, in the best interest
of, or legally required by, the undersigned, it being understood that the
documents executed by such attorneys-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorneys-in-fact may approve in such
attorney-in-fact's or attorneys-in-fact's discretion.

      The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16(a) of the Exchange Act or the Securities Act.  The Company will
use all reasonable efforts to apprise the undersigned of applicable filing
requirements for purposes of Section 16(a) of the Exchange Act or the Securities
Act.

     This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.  This Power of Attorney revokes and replaces any
prior Power of Attorney executed by the undersigned with respect to the
ownership, acquisition or disposition of securities of the Company.


      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 9th day of May, 2018.





Signature: /s/ William F. Oplinger


Printed Name: William F. Oplinger