This open access book comprises selected papers presented at the NUMIFORM 2023 conference, where recent developments, innovations and advances in numerical methods for material forming and shaping through plastic deformation were discussed. The conference topics include the broad areas of material behaviour and modelling and its numerical implementation; process modelling (forming, joining, machining, casting, welding/joining and additive manufacturing, etc., of metals, polymers and composites) and its numerical implementation; and conventional and novel methods of forming and joining metals and polymer and composite processing. This book serves as a valuable reference for academicians and industry professionals alike.