3D printing materials are substances used to create three-dimensional objects through additive manufacturing. Common materials include thermoplastics, such as PLA and ABS, which are popular for their ease of use and versatility. Other materials include resins for high-detail prints and metals for strong, durable parts, often used in industrial applications. In addition to these, there are specialized materials like ceramics and composites that offer unique properties, such as heat resistance or lightweight strength. The choice of material depends on the desired characteristics of the final product, including flexibility, strength, and appearance.