The MMTA is the world’s largest association involved with the full spectrum of Minor Metals. From just 19 founding members, the MMTA is now comprised of circa 130 companies from 25+ countries engaged in the global minor metals industry with a collective annual worth in excess of USD 10 billion. These metals are as diverse as zirconium, hafnium, strontium and rhenium – as well as all the traditional by-product metals such as molybdenum, tungsten or indium.