Only a handful of materials are well-established in three-dimensional (3D) printing and well-accepted in industrial manufacturing applications. However, recent advances in 3D printable materials have shown potential for enabling numerous novel applications in the future. This special issue, consisting of 2 reviews and 10 research articles, intends to explore the possible materials that could define next-generation 3D printing.
Keywords: 3D printing; 4D printing; additive manufacturing; biomaterials; ceramic; composite; concrete; metal; smart materials.