In Friction welding the method apply for welding process is to rub one object with another to fuse them together. As fusion take place when pressure is applied on both the objects. Since heat is generated from the friction of two objects there is a minimal level of effect to the surrounding areas.

Friction welding process is suitable for the objects where the melting points differ. As the process is only for fusion of objects melting is not done during the process. As the method is like forging of the objects. During the friction of objects two types of welding takes place. In the first stage two different metals are fused together and in the second stage thermoplastics are used.

When the objects are fused together spin welding technique is been used. In this technique it rotates one piece of the metal while other piece remains ideal. When pressure is applied rotating piece is stopped. The other similar method for welding that can be used is linear welding. The only difference between the two process is in linear pieces are rubbed in up and down direction where as in spin it rotates. Plastics and metals can be joined together with the help of thermoplastic process. It is advance way to join the metals which are not possible in traditional welding process.