The dry sliding friction and wear properties for ultrasound in situ prepared Al3Ti/7075 aluminum matrix composites were studied at different loads and sliding speeds. Using SEM to observe and analyse the microstructure of wear surface and wear debris, the wear mechanism of materials under different loads was discussed. The results show that the wear quality loss of matrix and composite material with sliding friction speed and load is increased. The matrix and composite material are transformed from mild wear to severe wear abrasion. When the load is 1030N, the matrix and composite material are characterized by scouring abrasion; when the load is 120N, the matrix and composite material are characterized by delamination wear, and the wear quality loss of matrix is particularly serious compared with aluminum matrix composites. Under these conditions, the wear performance of composites increases by 14.6%18% compared to the matrix.