Abstract: Single walled carbon nanotubes/TiC/6061 aluminum matrix composites were prepared by high-energy ball milling and vacuum hot pressing sintering, and the effect of different TiC contents on the microstructure and mechanical properties of 6061 aluminum alloy was studied. The results show that with the increase of TiC content, the hardness of aluminum based composites increases, while the tensile strength first increases and then decreases. When the mass fraction of TiC is 4%, the grain size of the composite material is the smallest, and its comprehensive performance is the best. The tensile strength is 196.4MPa, and the hardness value is 81.7HV0.1. The main strengthening mechanisms are dispersion strengthening and second phase strengthening, with the second phase mainly consisting of single-walled carbon nanotubes and TiC.