Biomaterials are artificially produced materials intended for the restoration or replacement of body tissues that are exposed to the impact of body fluids. ASTM F 1537 or CoCrMo alloy is characterized by excellent corrosion resistance, strength and biocompatibility, which is why it has a wide range of applications in medicine. By covering the mentioned alloy with a PACVD TiN coating, the goal is to improve its mechanical and tribological properties, which was examined in this final thesis. In the experimental part of the research, the characterization of the coating was carried out by examining its roughness, thickness and nanohardness. The resistance to adhesive wear was tested using the "block on ring" method, where the wear track and the value of the friction factor were evaluated. The adhesion of the coating was tested using the Rockwell C hardness test device, and the chemical composition of PACVD TiN coating was determined using the energy dispersive spectroscopy (EDS) method. The conducted tests revealed a slight increase in the roughness profile of the TiN coating compared to the uncoated material, with the appearance of surface irregularities being filled. A good compatibility of the tribocouple coated with a TiN coating was obtained, as well as a decrease in the friction coefficient. Adhesion and thickness of the coating are satisfactory values, and the EDS method indicated a favorable proportion of chlorine in the coating, which contributes to the improvement of its properties.