The effects of Er element on textures of Al-Mg-Si-Cu alloy sheets were investigated by means of orientation distribution functions（ODFs）.The results show that the major textures of as-rolled AlMg-Si-Cu alloy sheets are composed of rotated cube texture{100}<011>

and{111}<110>、{111}<112> brass Rtexture

while conventional rolling B

S

Ctextures are very low

which is closely related with a large number of dispersedly intermetallic compound particles contained in the alloy.After solution heat-treatment

the major textures of Al-Mg-Si-Cu-Er alloy contained 0.1% Er element are Brass texture and Cube+ND25texture.PSN is one of the recrystallization nucleation mechanism of aluminum alloy.As the Er content increase to 0.2%

the major texture of aluminum alloy is the weaker Brass texture

and PSN nucleation is receded.Er can affect the matrix lattice and reduce the energy of the fault layer as well as restricting the cross slide.