The pressing need for solutions that provide the same functional capacity but at a lighter weight is apparent across numerous industries and lightweight metals provide the most advanced solution to meet this. Through detailed technical primary research, IDTechEx have analysed the complete supply chain for aluminium, magnesium, metal matrix composites (MMC), and metal foams. Each one stands at different levels of market maturity, but all possess underlying advancements in technological innovations and contain a wealth of opportunities.