SiC particle reinforced aluminum matrix composites have broad application prospects in the field of rail transit. However, this material is prone to brittle phases that affect the quality of joints during the melting welding process, which restricts the development of SiC particle reinforced aluminum matrix composites. Ti and Si element compensation is applied to suppress the brittle phase of Al₄C₃ and laser powder welding of SiCp/ 2009Al composite materials. Ti and Si element compensation is used to suppress the brittle phase of Al₄C₃, and laser powder welding is conducted on SiCp/2009Al composite materials. SEM and XRD are used to analyze the microstructure of the welded joint. The hardness and tensile properties of the joint are tested using a vickers hardness tester and a universal testing machine, respectively, in order to analyze the influence of Ti₅Si₃ content on the microstructure and mechanical properties of the joint. The results indicate that the addition of Ti₅Si₃ has a significant effect on inhibiting the decomposition of SiC particles and the formation of Al₄C₃ brittle phase through their reaction with Al, but the Al₄C₃ brittle phase is not found in the weld seam; with the increase of Ti₅Si₃ content, the distribution density and size of Al₃Ti in the weld microstructure first decrease and then increase, the morphological integrity of the fusion zone first increases and then decreases, and the width of the heat-affected zone first decreases and then increases; with the increase of Ti₅Si₃ content, and the tensile strength of the joint shows a trend of first increasing and then decreasing, the tensile strength of the welded joint with 20% Ti₅Si₃ powder added is 2.8 times that of the welded joint with 50% Ti₅Si₃ powder added.