This edition introduces to readers the articles devoted to researching additive manufacturing technologies and solving pressing problems in this area. Possible ways of using additive technologies to manufacture machine parts in modern mechanical engineering are also analysed. The book will be helpful to many engineers, academics and students whose activities are related to 3D printing. All presented articles were introduced at the 2021 ASEAN Conference on Additive Manufacturing (ACAM 2021, October 28-29, 2021, the Philippines).