Researchers in Japan have developed a multi-material 3D printing technique for lightweight, strong parts for cars.

"Multi-material structures" which strategically combine different materials for optimal performance of a component can also be created via 3D printing. For example, steel automobile parts can be ...

Others require many additional parts, which are often metal. For example, many 3D-printed gun blueprints focus on a weapon’s lower receiver, which is basically the chassis of a firearm.