Pouring titanium slagMany construction engineers have long been dreaming of a cheap material with a similar weight to strength ratio as titanium. Last year a Korean team of materials scientists made a breakthrough discovery concerning steel-aluminum alloys. These alloys have the potential to reach very high strength to weight ratios.

Current aluminum alloys also offer very high strength, however they are also very brittle. This is because aluminum and iron form very hard B2 crystals. The research team found a way to disperse these crystals such that they are surrounded by softer material. This allowed them to create a very strong, ductile material which could possibly be used in the automobile and aircraft industries.