Material wear refers to the gradual degradation of a material's surface due to mechanical action, such as friction, impact, or abrasion. This process can lead to the loss of material, changes in shape, and reduced performance of components. Common examples of wear include the erosion of metal parts in machinery and the wearing down of tires on vehicles. There are several types of wear, including adhesive wear, where materials stick together and then separate, and abrasive wear, which occurs when hard particles scratch a surface. Understanding material wear is essential for improving the durability and lifespan of products in various industries, including automotive and manufacturing.