Casting materials are substances used to create objects by pouring liquid into a mold. Common materials include metal, plastic, and ceramic. Each material has unique properties, such as melting point and strength, which influence the final product's characteristics. The choice of casting material depends on the intended use of the object. For example, aluminum is often used for lightweight parts, while silicone is popular for making flexible molds. Understanding the properties of these materials helps manufacturers select the best option for their specific applications.