In order to study the effect of electropulsing-assisted ultrasonic rolling on metal oxide layer

double annealed TC4 titanium alloy was treated in this way. The cross section metallograph

wear resistance and wear surface morphology of the treated surface were detected and analyzed by optical microscope

friction wear testing machine and electron microprobe. The results show that the surface oxide layer with the thickness of 120μm is transformed into a compact α–phase oxide layer with the thickness about 11μm after electropulsing-assisted ultrasonic rolling with the current of 400A. The friction and wear properties of the treated sample were tested and the low friction coefficient can maintain for a long time during the testing. The testing results show that the abrasion loss of treated sample is half of that of the turning sample and the wear surface is smooth. Meanwhile

the particles that adhere to the wear surface and the ploughs on the wear surface are less

which indicates that the wear resistance after treatment is greatly enhanced.