A steel composite is a material that combines steel with one or more other materials to improve its properties or to create a combination of features that would not be possible with steel alone. There are several types of steel composites, each of which incorporates different materials for specific purposes. Here are some examples. Fiber Reinforced Steel: Steel can be reinforced with carbon or glass fibers to increase strength and reduce weight. These composites are often used in structural, automotive and aerospace applications, where the combination of light weight, strength and performance is essential.