Annealing, in metallurgy and materials science, is a heat treatment that alters the physical and sometimes chemical properties of a material to increase its ductility and reduce its hardness, making it more workable. It involves heating a material above its recrystallization temperature, maintaining a suitable temperature, and then cooling. The material will be in the furnace with different levels of temperature and time. Specialised sensors will determine the quality expected. H0 to H22 Hardness levels