Abstract: PCD tool was used to cut reinforced titanium matrix composites at different cutting speeds, and the tool wear during high speed cutting was studied. The results show that the volume fraction of reinforcement phase has a significant effect on the tool durability of PCD, which is that the higher the volume fraction, the more serious the tool wear with lower tool durability. The type of reinforcement phase also has an obvious effect on the tool life, namely the effect of TiB_w on tool life greater than that of TiC_p. The wear patterns of PCD tools are similar when cutting different titanium matrix composites, which are mainly the wear of rake and back faces, accompanied by tool chipping and microcracks. The main wear mechanisms of PCD tools are abrasive wear and adhesive wear, and the higher the volume fraction of the reinforcement phase, the more obvious the adhesive wear.