The use of a constrained groove pressing (CGP) method to plastically deform AA6063 aluminum alloy led to the improved surface properties. It was found that hardness magnitude is dramatically improved and its uniformity is considerably decreased after the first pass, while subsequent passes result in better hardness behavior for the processed material. Also, the elongated grains formed in the first pass of the CGP are gradually converted to the equiaxed counterparts by adding pass numbers. Eventually, higher corrosion resistance of the sample by imposing the CGP process is related to the quick formation of passivation film and the change in the morphology of the second phase and precipitates which hinder their electrochemical reactions and decrease the potential localized attack sites. C1 [Fan, Ren-jie] Tongling Vocat & Tech Coll, Dept Mech Engn, Tongling 244061, Peoples R China. [Attarilar, Shokouh] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran, Iran. [Shamsborhan, Mahmoud] Islamic Azad Univ, Mahabad Branch, Dept Engn, Mahabad, Iran. [Shamsborhan, Mahmoud] Univ Zakho, Dept Mech Engn, Zakho, Kurdistan Regio, Iraq. [Ebrahimi, Mahmoud] Univ Maragheh, Dept Mech Engn, Fac Engn, Maragheh, Iran. [Gode, Ceren] Pamukkale Univ, Sch Denizli Vocat Technol, Program Machine, Denizli, Turkey. [Ozkavak, Hatice Varol] Isparta Univ Appl Sci, Tech Sci Vocat Sch, Dept Mech & Met Technol, Isparta, Turkey.