Book excerpt: This book systematically introduces the principles of flexible forming technologies to manufacture thin-walled complex-shaped components, the mechanism of controlling the material flow, the design and the configuration of flexible forming technologies’ equipment and tools. It covers new technologies and new processes for forming hollow components, and relevant research on forming mechanisms, deformation laws, and defect control with examples from practical applications. It will be a useful reference for researchers, engineers, graduate and undergraduate students in aerospace, nuclear, railway, vehicle and petrochemical engineering, etc.