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Title:: Research Progress on Surface Treatment Technologies of Titanium and Titanium Alloys

Author(s):: WANG Dong; ZHANG Xiaojing; DAI Hongyuan; LI Yonghua; CHANG Hui; 1. Hebei Yanxing Machinery Co., Ltd., Zhangjiakou 075000China 2. SHANGI Insititute for Advanced Materials(Nan Jing)Co., Ltd., Nanjing 210046China 3. School of Materials Science and EngineeringNanjing University of TechnologyNanjing 211816China

Keywords:: titanium; titanium alloys; surface treatment technology; surface modification; surface wear and corrosion resistance; surface coloring; surface isolation

Abstract:: Titanium and titanium alloys have many advantages such as high specific strength, corrosion resistance, high temperature resistance and excellent biocompatibility, and are widely used in aerospace, national defense and military industry, marine ships, biomedical and other important fields. At the same time, they also have some disadvantages such as oxidationprone, low hardness, poor thermal conductivity and high electrode potential, which limit their application obviously. Surface treatment can change the surface state of substrate，improve the visual perception and performance，and even obtain some new functions that the substrate does not have，which is of great significance to improve the service life and reliability and expand the application field of titanium products．At present, almost all surface treatment technologies have been applied to the field of titanium and titanium alloys surface treatment, but still can not fully meet the performance requirements．In this paper，the characteristics and research progress of surface treatment technologies of titanium that commonly used in four functional fields are reviewed，including surface modification，surface wear and corrosion resistance，surface coloring and surface isolation，and the development direction of titanium surface treatment technology is prospected．