The document analyzes alternative materials for roll cages to protect vehicle occupants during crashes. It compares the properties of various materials including carbon fiber, titanium, aluminum, and steel alloys. Analysis through finite element analysis (FEA) and the Ashby method determined that carbon fiber composite was the best material choice due to its high strength and stiffness but low weight. Titanium was the second best choice. Aluminum was found to be the worst choice for roll cages.