Recrystallization is a process in which new grains are formed in a metal, and it occurs at a specific temperature known as the recrystallization temperature. This temperature is also called the recrystallization or recovery temperature.

The recrystallization temperature is an important parameter in metallurgy as it determines the ability of a metal to undergo recrystallization. It depends on various factors such as the composition of the metal, the degree of deformation, and the rate of heating.

The recrystallization temperature is typically lower than the melting temperature of the metal. It is the temperature at which the deformed grains of the metal start to recover and new grains are nucleated and grow. This process results in the creation of a new set of strain-free and equiaxed grains with a lower dislocation density.

The recrystallization temperature is influenced by the presence of impurities and alloying elements in the metal. These impurities and alloying elements act as obstacles to the movement of dislocations, which in turn affects the recrystallization temperature. For example, the addition of certain elements can lower the recrystallization temperature by promoting the nucleation of new grains.

The recrystallization temperature is an important parameter in the heat treatment of metals. It is used to determine the optimum temperature and time required for the recrystallization process to occur. By controlling the recrystallization temperature, the properties of the metal can be manipulated to meet specific requirements.

In conclusion, the temperature at which new grains are formed in a metal is called the recrystallization temperature. It is an important parameter in metallurgy and is influenced by various factors such as composition, degree of deformation, and the presence of impurities and alloying elements.