Biocompatible materials are substances that can safely interact with biological systems without causing harmful reactions. These materials are often used in medical applications, such as implants, prosthetics, and drug delivery systems, to ensure they do not provoke an immune response or toxicity in the body. Common examples of biocompatible materials include titanium, silicone, and certain types of polymers. These materials are designed to integrate well with human tissues, promoting healing and functionality while minimizing complications. Their use is crucial in fields like tissue engineering and medical device manufacturing.