The work aims to study effects of surface texture on tool machinability during high speed cutting of titanium alloy. Changes of cutting force, friction coefficient and cutting adhesion under different conditions were analyzed by performing high speed cutting test of titanium alloy with conventional tools (un-textured tools) and textured polycrystalline diamond (PCD) tools. Cutting force and friction coefficient of PCD tools could be effectively reduced by increasing cutting speed. When the cutting speed ranged from 16.485 m/min to 175.84 m/min, compared with un-textured tools, textured tools exhibited the best dry machinability as a whole. Moreover, axial thrust force, main cutting force and friction coefficient of the textured tools could be reduced by up to 71.75 N, 39.95 N and 0.13. High speed machining can significantly reduce cutting force and friction coefficient of tool-chip interface. Compared with conventional tools, textured PCD tools can exhibit better dry machinability at low speed obviously, and have better anti-friction effect than that under the condition of low-temperature lubrication.