Titanium nitride is widely used for its exceptional hardness and wear resistance, making it ideal for coating cutting tools such as drills, milling cutters, and inserts. This coating significantly extends tool life by reducing friction and preventing corrosion. It is also applied in the manufacturing of medical devices, including surgical instruments and implants, due to its biocompatibility and resistance to body fluids. In electronics, titanium nitride serves as a conductive barrier layer in semiconductor devices, preventing diffusion of metal into silicon. Its golden color and durability make it suitable for decorative finishes on consumer products like watches and jewelry. Additionally, it is used in aerospace and automotive industries for protecting engine components exposed to high temperatures and mechanical stress.