Mg-based bulk metallic glass;  composite materials;  abrasion resistance;  Ti element

By adding the light metal element Ti, the (Mg65.25Cu10.0Gd65.0) 25-xTix (x=0, 1.100, 0 and 2.5) bulk metal-glass composites with Mg5Cu7Gd5 metal glass as the matrix were successfully prepared by copper mold suction casting, and the material showed high specific strength. The wear resistance of the massive metal-glass composite was studied by means of disc pin friction experiment. The experimental results show that the formation of crystalline phase Ti particles on the Mg block metal glass matrix can effectively improve the wear resistance of the composite, and with the increase of Ti content, the hardness of (Mg0.65Cu0.25Gd0.1)100-xTix (x=0, 2.5, 5 and 7.5) composites gradually increases, and the wear volume loss shows a trend of first decreasing and then increasing, when the atomic number fraction containing Ti reaches 5%. The composite showed the smallest wear volume loss, which was reduced by 65% compared with the single Mg25Cu10Gd20 metal glass.Finally, the mechanism of significantly improving the wear resistance of Mg-based bulk metal glass composites was analyzed from the perspective of microhardness and compression plasticity.