The fabrication process that is used to join materials such as metals and thermoplastics is referred to as welding. In this sculptural process, heat is used to melt the parts and left to cool that ultimately causes fusion. Various energy sources are used for welding, the most common of them are gas flame, an electric arc, an electron beam, friction and ultrasound. Shielding metal arc welding, flux-cored arc welding, submerged arc welding, electroslag welding, gas metal arc welding and gas tungsten arc welding are the most commonly used welding methods. Significant precautions should be made to avoid injuries during welding such as electric shock, inhalation of poisonous gases and fumes, burns, and intense ultraviolet radiation. The topics included in this book on welding are of utmost significance and bound to provide incredible insights to readers. Different approaches, evaluations and methodologies on various techniques of welding have been included herein. Coherent flow of topics, student-friendly language and extensive use of examples make this book an invaluable source of knowledge.