Process method for improving texture and precipitated phase and improving strength of aluminum-lithium alloy

The invention discloses a process method for improving texture and precipitated phase and improving the strength of an aluminum-lithium alloy, which comprises the following steps: carrying out homogenizing annealing treatment on an aluminum-lithium alloy ingot, and then carrying out multi-pass hot rolling on the ingot subjected to homogenizing annealing treatment to obtain an aluminum-lithium alloy hot-rolled plate, carrying out asynchronous cold rolling on the aluminum-lithium alloy hot-rolled plate to obtain an aluminum-lithium alloy cold-rolled plate; and finally, sequentially carrying out solution treatment and artificial aging treatment on the aluminum-lithium alloy cold-rolled plate. By improving the rolling process and the heat treatment process, the texture components in the rolled plate are regulated and controlled, the proportion of the S texture is effectively reduced, precipitation of a T1 strengthening phase is promoted, and the strength of the aluminum-lithium alloy plate is improved. The proces