 Metal powder bed fusion, PBF, has become increasingly popular due to its ability to produce complex parts with high accuracy and repeatability. However, there are still many challenges associated with this process, such as material compatibility issues, porosity, cracking, loss of alloying elements and oxide inclusions. To address these challenges, optimizing printing parameters, using support structures and post-processing techniques have been suggested. Additionally, future research into metal composites, functionally graded materials, multi-alloy structures and materials with tailored properties will be necessary to further advance PBF technology. This article was authored by Lai Mingyao, Adifya Ramesh, Zhongmin Shao, and others.