Grade 5, also known as Ti6Al4V, Ti-6Al-4V or Ti 6-4, is the most commonly used alloy. It is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties (excluding thermal conductivity, which is about 60% lower in Grade 5 Ti than in CP Ti). Among its many advantages, it is heat treatable. Grade 5 has an excellent combination of strength, corrosion resistance, weld and fabricability. Consequently, it is used extensively in aerospace, medical, marine, and chemical processing, combustion engine connecting rods and surgical implants.