Plasticity　zone　at　crack　tip　of　aluminum　alloy　with　fcc　structure　is　investigated　in　order　to　analyze　the　effect　of　crystal　orientation　to　the　plasticity　distribution　on　crack　tip,　as　well　as　the　effect　to　CTOD　and　J-integral,　which　is　implemented　using　finite　element　code　in　Abaqus　with　a　rate　dependent　crystal　plasticity　theory.　The　results　show　that　the　crack　tip　plasticity,　stresses　and　CTOD　are　significantly　affected　by　grain　orientations.　When　the　grains　have　single　textures,　Cube　and　S　orientations　have　a　strong　ability　to　against　crack　propagation.　However,　when　the　grains　combine　textures,　the　increasing　of　misorientation　enhances　the　resistance　for　crack　growth.　And　when　the　tilt　angle　is　higher,　the　crack　deflection　is　promoted　to　reduce　the　crack　propagation　rate.　©　2016　Trans　Tech　Publications,　Switzerland.