The term 'mechanical twisting' can be summarized as torsion, which is the act of twisting or rotating an object around its axis. Torsion is a common mechanical phenomenon that occurs when a force is applied to an object, causing it to twist or rotate. This force can be applied in a variety of ways, such as through a lever, a pulley, or a spring. Torsion is used in many applications, including in the construction of bridges and buildings, in the operation of machines, and in the design of engines.