This chapter is from the book ASM Handbook: Volume 14A: Metalworking: Bulk Forming, which is a reference for manufacturing, materials, and design engineers. It provides comprehensive coverage and essential technical information on the process-design relationships that are needed to select and control metalworking operations that produce shapes from forging, extrusion, drawing and rolling operations. This engineering reference book is an invaluable reference resource for process and production engineers and industrial (shop-floor) personnel in the automotive, aerospace, and other industries, as well as for students of metal forming. In-depth discussion of forming equipment, processes, materials, and advanced modeling techniques make it a substantially new updated ASM Handbook.