This book presents the select proceedings of 21st ISME conference on Advances in Mechanical Engineering. It covers the latest research and technological advancements in the area of manufacturing and materials engineering. Various topics covered in this book are additive manufacturing, rapid prototyping, micro and nano manufacturing, welding, casting, forming process, conventional and non-conventional machining, CIM, CAM, modeling and simulation, composite materials, powder metallurgy, supply chain management, reliability engineering/quality engineering product life cycle management, industry 4.0, micro machining, surface science and engineering, materials characterization and functionally graded materials. The book is useful for researchers and professionals working in the areas of manufacturing and materials engineering.