The　microstructure　evolution　of　the　7050　Al　alloy　treated　by　age-forming　was　studied　using　a　designed　device　which　can　simulate　the　age-forming　process.　The　grain　shape,　grain　boundary　misorientation　and　grain　orientation　evolution　of　7050　Al　alloy　during　age-forming　have　been　quantitatively　characterized　by　electron　backscattering　diffraction　technique.　The　results　show　that　age-forming　produced　abundant　low-angle　boundaries　and　elongated　grains,　which　attributed　to　stress　induced　dislocation　movement　and　grain　boundary　migration　during　the　age-forming　process.　On　the　other　side,　the　stress　along　rolling　direction　caused　some　unstable　orientation　grains　to　rotate　towards　the　Brass　and　S　orientations　during　the　age-forming　process.　Hence,　the　intensity　of　the　rolling　texture　orientation　in　age-formed　samples　is　enhanced.　But　this　effect　decays　gradually　with　increasing　aging　time,　since　stress　decreases　and　precipitation　hardening　occurs　during　the　age-forming　process.　©　2015　Elsevier　Inc.　All　rights　reserved.