Annealed wire is electrical wire that has been softened through a controlled heating and gradual cooling process to relieve internal mechanical stress and enhance flexibility.
Annealed wire plays a vital role in the electrical and low-voltage cabling systems used throughout commercial and industrial environments. During the manufacturing process, copper wire is drawn through dies to achieve the desired diameter. This cold-working process increases the wire’s hardness and tensile strength but decreases its ductility. Annealing reverses these effects by heating the wire to a specific temperature and allowing it to cool slowly, which restores its pliability and makes it easier to handle and route.
Annealed wire is especially beneficial in stranded conductor designs, where flexibility is essential. The process also contributes to the wire’s consistent conductivity, making it a dependable choice in data communications, structured cabling, access control, AV systems, and temperature control applications.
Unlike hard-drawn wire, which remains stiff and is more difficult to maneuver, annealed wire is preferred in environments where cables must bend, turn, or move during installation or service. Its improved elongation properties also help reduce the risk of breakage under mechanical stress during setup or operation.
The use of annealing dates back thousands of years in metallurgy, but its adoption in wire manufacturing became widespread with the rise of industrial electrical systems. As commercial building standards advanced, annealed copper wire became a material of choice due to its balance of conductivity, strength, and workability.