Abstract: Texture evolution in extruded and hot-rolled Al-Mg-Li aeronautical alloys during in-situ tension was investigated by using electron backscattered diffraction (EBSD). A field emission scanning electron microscope (FE-SEM) and a MICROTEST-5000 tensile stage were used to carry out in-situ tension tests and observations. The crystallographic texture of the extruded sample changed from weak cube texture 001〈100〉 to texture 018〈081〉 during tension fracture. However, strong Brass 110〈112〉 in the hot-rolled sample was modified into a mixture texture component of Brass 110〈112〉 and S 123〈634〉 during tension fracture. Texture evolution in the two samples during tension can be explained by the rotation of grain orientation.