3D printing is an additive manufacturing technology that rapidly turns computer-aided designs into complex 3D objects on demand. As an attractive research field and emerging industrial technology, 3D printing research made great progress in mechanism, method and functionalization in 2020. This article reviews the research hotspots and representative results of 3D printing from the aspects of printing method improvement, new ink development, solidification nucleation mechanism, new structure preparation, as well as new applications.

3D printing  /  photopolymerization  /  printing precision  /  printing speed  /  metal printing