Springback is the tendency of a cold worked metallic part to partially return to its original shape after the removal of the forming force. It is a very common phenomenon in sheet metal forming due to the elastic nature of any metal. It depends not only on the mechanical properties of the metal, but also on the geometrical features like bend radius, thickness, bend angle and the moment of inertia of the shape created. High speed forming operations have been found to reduce or eliminate springback. There are many hypotheses regarding the reason for this phenomenon and the essential physics are still a matter of debate.