Fictional materials are substances that exist only in stories, movies, or games, rather than in the real world. These materials often have unique properties that serve specific purposes in their respective narratives. For example, vibranium from the Marvel Universe is known for its ability to absorb vibrations, while unobtainium is often used in science fiction to describe a rare and valuable resource. These materials can enhance storytelling by introducing elements of wonder and creativity. They allow authors and creators to explore concepts that challenge the laws of physics or chemistry, such as adamantium, which is famously known for its incredible strength in the X-Men series.