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There is more information available on this subject at Titanium on the English Wikipedia.
A BXR titanium mine on Reach.

Titanium (pronounced /taɪˈteɪniəm/) is a chemical element with the symbol Ti and atomic number 22. It is a light, strong, lustrous, corrosion-resistant (including to sea water and chlorine) transition metal with a grayish color. Titanium was discovered in England by William Gregor in 1791 and named by Martin Heinrich Klaproth for the Titans of Greek mythology.

The planet Reach had plentiful deposits of titanium, which were the original reason for its colonization.[1] With numerous titanium mines, Reach was the largest non-automated exporter of titanium in human-controlled space by 2535.[2]


Titanium can be alloyed with iron, aluminium, vanadium, molybdenum, among other elements, to produce strong lightweight alloys for aerospace (jet engines, missiles, and spacecraft), military, industrial process (chemicals and petro-chemicals, desalination plants, pulp and paper), automotive, agri-food, medical (prostheses, orthopaedic implants, dental implants), sporting goods, jewelry, and other applications.

Titanium has many military applications, particularly as a form of armor. Titanium is a major component in the UNSC's Titanium-A armor, a form of titanium that has been specifically strengthened on a molecular level.[3] Titanium is used in the construction of the M12 Warthog FAV and its variants.[4] The M808 Scorpion main battle tank is outfitted with thick ceramic-titanium armor plating that is incredibly resilient to damage.[5] ODST armor[6] and Long Range Stealth Orbital Insertion Pod[7] both incorporate titanium as a form of armor. Non-reflective titanium carbide coating is used on the standard UNSC combat knife.[8] Titanium is used to create strong physical restraints, such as wristlets and chains.[9] Titanium is also used in products such as fire extinguishers,[10] plybars,[11] and protective blast doors.[12] Some artificial limbs use titanium in the joints of the fingers.[13]

Titanium is commonly used as a strong form of structural support. Six beveled titanium spars were used as support on the Tiara orbiting Harvest.[14] The ceiling of Mack's data center on Harvest was braced with titanium beams.[15] Kurt Ambrose's residence in Camp Currahee on Onyx was reinforced by titanium girders.[16] Titanium supports were also used in the interior of Chiroptera-class stealth vessels.[17] In preparation for Operation: FIRST STRIKE, the Spartan-IIs reinforced the hull of a Type-25 Spirit with titanium plates in order to allow the dropship to withstand the stresses of a slipspace exit.[18]


  1. ^ Halo: The Fall of Reach, page 70; (2010), page 89
  2. ^ Bungie.net: Planet: Reach (excerpt from CAA FACTBOOK l.update 12.7.2535)
  3. ^ Halo Encyclopedia, page 315 (2011 edition)
  4. ^ Bungie.net: Defiant Map Pack
  5. ^ Halo: The Flood, page 152 (2010 edition)
  6. ^ Halo: Ghosts of Onyx, page 13
  7. ^ Halo 3, Armory
  8. ^ Halo: The Fall of Reach, page 100 (2010 edition)
  9. ^ Halo: Evolutions, "Pariah", page 37
  10. ^ Halo: Evolutions, "Midnight in the Heart of Midlothian", page 90
  11. ^ Halo: Evolutions, "Pariah", page 47
  12. ^ Halo: First Strike, page 149 (2010 edition)
  13. ^ Halo: Contact Harvest, page 86
  14. ^ Halo: Contact Harvest, page 66
  15. ^ Halo: Contact Harvest, page 179
  16. ^ Halo: Ghosts of Onyx, page 140
  17. ^ Halo: Ghosts of Onyx, page 145
  18. ^ Halo: First Strike, page 359 (2010 edition)