Multi-material 3D printing
Multi-material 3D printing is the additive manufacturing procedure of using multiple materials at the same time to fabricate a workpiece. Similar to single material additive manufacturing it can be realised through various 3D printing methods such as fused filament fabrication (FFF), selective laser sintering (SLS), stereolithography (SLA) and inkjet (material jetting).
Source: Wikipedia — Multi-material 3D printing (CC BY-SA 4.0)