Aluminum matrix composites are a type of excellent structural material, however, their poor weldability necessitates significant improvements in joint properties. Ti was introduced into a CoCrNi-reinforced AlSi12 filler during laser powder-filled welding of SiC_p/6061Al composites to investigate its influence on the welded joints. The results show that the Ti is evenly distributed in the weld, and TiNi3 phase is formed around the CoCrNi phase, Additionally, the CoCrNi phase changes from the coarse dendritic shape to the fine triangular shape, contributing to solid solution strengthening, dispersion strengthening, and fine grain strengthening. The interface of the fusion zone of the welded joint was clear, with no reaction products generated at the interface,forming a good physical metallurgical interface. After adding Ti to the welding filler, the weld hardness increased by 30%, and the tensile strength and extension of the welded joint increased at the same time. When performing SiC_p/6061Al laser filler welding, adding Ti to CoCrNi reinforced AlSi12 mixed filler can effectively improve the quality of welded joints and improve mechanical properties.