Properties of Titanium Ti-6Al-4V (Grade 5):

Grade 5 Titanium is one of the most popular alloys in the titanium industry and makes up almost half of the titanium used in the world.  Commonly referred to as Ti-6AL-4V (or Ti 6-4), this designation refers to its chemical composition of almost 90% titanium, 6% aluminum, 4% vanadium, 0.25% (max) iron  and 0.2% (max) oxygen.  It has excellent strength, low modulus of elasticity, high corrosion resistance, good weldability and it is heat treatable.  The addition of aluminum and vanadium increases the hardness of the material in the alloy matrix, improving its physical and mechanical properties.

• High modulus of elasticity—Titanium is very
  “springy.” For a given force, it will deflect more
  than steel, which results in a higher likelihood of
  vibration, chatter, and poor chip formation.
• Shear mechanism—Titanium requires a sharp
  cutting edge to cut the material and avoid tearing
  and smearing, which will quickly lead to tool
  failure