Titanium or Tin is a METAL with five letters. It is a chemical element with the symbol Ti and atomic number 22. Titanium is a strong, lightweight METAL that is used in many industries, including aerospace, automotive, medical, and jewelry. Tin is a soft, malleable METAL with the symbol Sn and atomic number 50. It is often used in alloys, such as bronze and pewter, and is also used in electronics and food packaging.