Abstract Thixomolding is an innovative and sophisticated processing technique for fabricating magnesium matrix composites. In this study, SiC P /AZ91D composites were prepared by thixomolding using SiC particles as reinforcement phase. The influence of SiC P reinforcements on the microstructure and mechanical properties of the thixomolded AZ91D alloy were investigated via optical microscopy (OM), scanning electron microscopy (SEM), and tensile test at room temperature. The results indicated that