Surface heat treatment is a key process link in the processing of titanium alloy accessories, which is of great significance for improving the performance of accessories and prolonging the service life. When performing surface heat treatment, the following aspects need to be paid attention to: 1. Select the appropriate heat treatment method There are many kinds of heat treatment methods for titanium alloys, including annealing treatment, solution treatment, quenching treatment and tempering treatment, etc. Each method has its specific application scenarios and effects. When choosing the heat treatment method, comprehensive consideration should be made according to the material, performance requirements and processing conditions of titanium alloys. 2. Strictly control the heat treatment parameters Heating temperature and time Heating temperature is one of the key parameters in the heat treatment process, which needs to be determined according to the type and performance requirements of titanium alloys. Excessive heating temperature may lead to grain growth, microstructure coarsening, and affect the mechanical properties of the material; too low heating temperature may not achieve the expected heat treatment effect. Heating time also needs to be strictly controlled to ensure that alloying elements can be fully dissolved into the matrix, while avoiding problems such as oxidation and decarburization caused by excessive heating. Cooling rate Titanium alloys have poor hardenability, large thermal stress during quenching, and parts are prone to warping. Therefore, it is necessary to strictly control the cooling rate during the quenching process to avoid too fast or too slow cooling rate adversely affecting the material properties. 3. Selection of protective atmosphere Titanium alloys are prone to react with gases such as oxygen and hydrogen at high temperatures, resulting in problems such as oxidation, hydrogen absorption and even hydrogen embrittlement. Therefore, it is necessary to select a suitable protective atmosphere during the heat treatment process. Vacuum heat treatment is an effective means of protection, which can avoid the titanium alloy from direct contact with gases such as oxygen and hydrogen. During the vacuum heat treatment process, it is necessary to control the vacuum working pressure to avoid vacuum surface corrosion due to low vacuum pressure. In addition to vacuum heat treatment, inert gases (such as high-purity argon) can also be used as a protective atmosphere. When selecting inert gases, it is necessary to pay attention to their purity and dew point requirements to ensure the protective effect. 4. Control of surface quality and dimensional accuracy Titanium alloy parts are prone to cracks, deformation and other problems during the heat treatment process, which affect the surface quality and dimensional accuracy. Therefore, the following measures need to be taken during the heat treatment process: Optimize the heat treatment process to reduce stress concentration and deformation. Carry out necessary inspections and measurements before and after the heat treatment to ensure that the surface quality and dimensional accuracy of the accessories meet the requirements. 5. Equipment Maintenance and Management Heat treatment equipment is an important tool in the processing of titanium alloy parts, and its operating state directly affects the heat treatment effect. Therefore, it is necessary to regularly maintain the equipment, replace worn parts in time, clean up dust accumulation, etc.; At the same time, it is necessary to strengthen the management of equipment, formulate detailed operating procedures and safety management systems to prevent accidents caused by improper operation.