The weldability of in situ TiB2 reinforced ZL101 metal matrix composites ( MMCs ) was examined using laser-TIG hybrid welding technology.High speed camera was employed to observe the coupled results between laser plume and electric arc.Optical microscope ( OM),scanning electron microscope ( SEM),tensile machine and wearing equipment were used to evaluate the quality of welding joint.The effective hybrid welding was realized and defect-free seam was obtained when the laser power ( 8 kW),TIG current ( 100 A) and welding speed ( 3 m/win) were combined.TiB2 distribution became much more homogeneous than the pre-welded,and microstrueture of seam was finer obviously. Tensile and wear resistance test showed that the weld seam presented higher strength and better wear-resistance properties than the base metal The results indicated that TiB2 reinforced aluminum matrix composites were successfully welded using the laser-TIG hybrid welding method.