This special issue aims to provide a platform for studies on additive manufacturing of various metallic materials which have played a crucial role in human industry and civilization. Novel fundamental research work on the laser/electron beam-material interaction, melt flow behaviour, defect formation and inhibition mechanisms, novel metallurgical phenomena, microstructural evolution mechanisms, residual stress and strain development and process-microstructure-property relationships of the additively manufactured metallic materials are all welcome. New advancement in additive manufacturing technologies and materials is also encouraged to be submitted to this special issue. The issue seeks manuscripts in the form of research papers, or review articles or perspectives.