Abstract
Wear resistance of commercially pure titanium (CP titanium) is improved by nitriding. However it is usually reported that nitriding decreases the fatigue strength due to grain-coarsening. Besides, a low-temperature nitriding process is able to improve the fatigue properties by inhibiting the grain-coarsening. In order to improve both of the fatigue strength and wear resistance of CP titanium, a low temperature nitriding process was developed. This work will evaluate the effects of nitriding temperature on the microstructure and particularly the grain size of CP titanium. Then, 4-points bending fatigue properties of CP titanium were discussed based on the microstructures obtained.
