In general, the powder materials are sprayed evenly to create a thin layer for the laser or electron beam to melt the particles, followed by the rapid solidification for each layer of the 3D printed product. Selective laser sintering (SLS) and electron beam melting (EBM) are two of the common techniques applied to this 3D printing method. Materials like ceramics, thermoplastic particles, metal powders, alloys, plasters, and composites are commonly used with this method.