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Niobium titanium alloy refers to an alloy composed of metal niobium and metal titanium. The titanium content of industrially produced niobium-titanium alloys is generally 20% to 60% (mass). The most typical niobium-titanium alloy contains 66% titanium [about 50% (mass)]. They are important alloy-type superconducting materials with a superconducting transition temperature of 8 to 10 K. Adding other elements can further improve superconducting properties. Titanium exists in a solid solution state in the alloy. The alloy is sintered with mixed powder and electrodes composed of niobium flakes and titanium flakes are melted several times in a vacuum consumable arc furnace or electron beam to form an alloy ingot.

A superconducting alloy composed of two elements: niobium and titanium. The titanium content in the alloy is generally in the range of 46% to 50% (mass fraction), and it is the most widely used superconducting material.