AES TIETÊ ENERGIA S.A.

Publicly-Held Company CNPJ/MF 04.128.563/0001-10

NIRE 35.300.183.550

MATERIAL FACT

AES TIETÊ ENERGIA S.A. ("AES TIETÊ" or "Company") (B3: TIET11, TIET3, TIET4), in compliance with the terms of article 157, paragraph 4 of Law 6,404, and Instruction no. 358 as of January 3rd, 2002, and other applicable dispositions, informs to the shareholders and to the market that:

The Company has updated its projections regarding the preview of investments for the years of 2018 and 2019 including its estimated investments related to the solar assets Complexo Solar Boa Hora ("Boa Hora") and Complexo Solar Água Vermelha ("AGV Solar"). For the period between 2017 and 2021, the Company plans on investing a total of approximately R$ 980 million which will be allocated towards modernization and maintenance programs for its hydroelectric plants and investments towards the construction of Boa Hora e AGV Solar.

These projections will be included in section 11 of the Company's Reference Form and will be available on CVM's website onhttp://www.cvm.gov.br/ and the Company's website onhttp://ri.aestiete.com.br/,in the legal deadline.

Barueri, January 11th, 2018

AES TIETÊ ENERGIA S.A.

Clarissa Della Nina Sadock Accorsi Executive Vice President and Investor Relations Officer

AES Tietê Energia SA published this content on 11 January 2018 and is solely responsible for the information contained herein.
Distributed by Public, unedited and unaltered, on 11 January 2018 22:04:05 UTC.

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