This standard specifies the metallographic examination methods for titanium nitride coatings. This standard is applicable to the detection of metallographic structure, thickness and hardness of physical vapor deposition titanium nitride coating on high-speed steel. This standard is also applicable to the detection of the metallographic structure and thickness of titanium nitride coatings on other basic materials (carbon steel, high alloy steel, cemented carbide, stainless steel, copper, etc.).