1. Gold
  2. Titanium
  3. Aluminium
  4. Platinum
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Option 2 : Titanium

Titanium is an extremely useful metal. It is popularly known as 'metal of future'. Some of its uses are:-

  • It is corrosion-resistant due to the presence of a thin oxide coating on the surface of the metal. Due to excellent resistance to seawater, it is used in offshore rigs, ships’ propellers and desalination plants. 
  • It is lightweight, stable, heat-resistant and easy to work with therefore it finds many uses in aviation and aerospace applications.
  • The human body does not reject titanium, so it can be used for joint replacement and tooth implants. 
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