Lightweight metallic glass is strong as steel

As anyone who lives too close to a baseball field knows, glass can be frustratingly fragile. But a new type of glass, made from opaque titanium and zirconium instead of transparent silicon, is harder and tougher—and weighs less—than stainless steel. The California scientists who developed and tested the opaque glass hope it could one day replace steel and aluminum in a wide variety of products, from golf clubs to airplanes.

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