It is applied to metals made of casting, hot or cold forging, drawing, welding, machining, grinding and EDM (wire and plunge erosion). It is done in order to reduce the internal stresses that will occur in the material and the dimensional changes that may occur in both heat treatment and working conditions. It is made between 150°C and 650°C depending on the type of metal. Depending on the situation, a protective atmosphere may be required. If stress relieving is done on a material that has been hardened with heat treatment, the temperature and duration of the treatment should be chosen in a way that does not reduce the hardness of the material.