By testing the mechanical properties of cold rolled and annealed samples

the influences of cold rolling and annealing on mechanical properties of composite ingot of 4004/3003 aluminum alloy were analyzed

and the optimized cold rolling and annealing process parameters were presented. The dispersion-strengthened is gradually weakened with the first pass deformation increases

resulting in the decrease of strength. However

the strength is enhanced by increasing the deformation further to 60% as a result of working hardening

however

the heterogeneous distribution of the second phase in the microstructure of the compound ingot can be observed. The tensile tests of the annealed samples of composite plate show that due to recovery and recrystallization

the strength of the annealed plate is decreased and the plasticity is increased. Considering the comprehensive mechanical properties of plate

the optimized annealing process is 360 ℃ for one hour.