Textbook in PDF format This book addresses the fundamental technologies and advancements in gas metal arc welding (GMAW) in metal joining and additive manufacturing. It delivers in-depth knowledge on various aspects of GMAW processes, including principles and mechanisms, metal transfer modes, process variations, monitoring and control, automation and flexibility of power sources, joining of similar and dissimilar materials, additive manufacturing, and metallurgical aspects. The book concludes with challenges and opportunities that would lead toward future directions in the GMAW process