Cold rolling is a metalworking process where metal sheets or strips are passed through rollers at room temperature. This technique reduces the thickness of the metal while improving its surface finish and mechanical properties. The process is commonly used for materials like steel and aluminum to create products such as sheets, plates, and coils. During cold rolling, the metal undergoes strain hardening, which increases its strength and hardness. The process also enhances the material's dimensional accuracy and smoothness, making it suitable for various applications in industries like automotive, construction, and manufacturing.