This video introduces the fundamentals of composite materials, which are formed by combining two or more different materials to achieve properties superior to those of a single material. A composite is made up of three main components: the reinforcement (fibers or particles that provide strength and stiffness), the matrix (such as resin or metal that binds and distributes the load), and the interface, which serves as the bonding zone between the two and is crucial for overall quality. Composites are generally classified based on their matrix materials, namely polymer matrix composites (e.g., epoxy reinforced with glass or carbon fibers), metal matrix composites (using metals such as aluminum), and ceramic matrix composites (resistant to extreme temperatures). Their advantages include being strong, lightweight, corrosion-resistant, design-flexible, and durable, making them widely used in various fields—from furniture, transportation, and sports equipment to the aerospace industry, where more than 50% of modern aircraft structures are made from composites. Thanks to their superior properties and broad applications, composites have become essential materials in both everyday life and advanced technologies.