Titanium

Titanium

Titanium

About Titanium in the Aerospace Industry

Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density, and high strength. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine.

Discovered in Cornwall, Great Britain, by William Gregor in 1791, titanium was named by Martin Heinrich Klaproth for the Titans of Greek mythology. The element occurs within a number of mineral deposits, principally rutile and ilmenite, which are widely distributed in the Earth’s crust and lithosphere.  Additionally, it is found in almost all living things, water bodies, rocks, and soils. The metal is extracted from its principal mineral ores by the Kroll and Hunter processes. The most common compound, titanium dioxide, is a popular photocatalyst and is used in the manufacture of white pigments. Other compounds include titanium tetrachloride (TiCl4), a component of smoke screens and catalysts; and titanium trichloride (TiCl3), which is used as a catalyst in the production of polypropylene.

Titanium can be alloyed with iron, aluminium, vanadium, and molybdenum, among other elements, to produce strong, lightweight alloys with multiple uses:

  • aerospace (jet engines, missiles, and spacecraft)
  • military
  • industrial process (chemicals and petrochemicals, desalination plants, pulp, and paper)
  • automotive
  • agri-food
  • medical prostheses
  • orthopedic implants
  • dental and endodontic instruments and files
  • dental implants
  • sporting goods
  • jewelry
  • mobile phones
  • many other applications

The two most useful properties of the metal are corrosion resistance and strength-to-density ratio, the highest of any metallic element. Another feature is that in its unalloyed condition, titanium is as strong as some steels, but less dense. 

Titanium Cross-Reference List

TITANIUM CROSS-REFERENCE
TYPE MIL-T-9046H DESIGNATION MIL-T-9046J DESIGNATION ASTM-B265 DESIGNATION COMPOSITION FORM CONDITION SPECIFICATIONS
COMMERCIALLY PURE CP4 GRADE 1 UNALLOYED SHEET/PLATE 25 KSI MIN YEILD AMS-4940
TYPE I COMP A CP3 GRADE 2 UNALLOYED SHEET/PLATE 40 KSI MIN YEILD AMS-4902
TYPE I COMP C CP2 GRADE 3 UNALLOYED SHEET/PLATE 55 KSI MIN YEILD AMS-4900
TYPE I COMP B CP1 GRADE 4 UNALLOYED SHEET/PLATE 70 KSI MIN YEILD AMS-4901
BAR   AMS-4921
ALPHA ALLOYS TYPE II COMP A A-1 GRADE 6 5Al-2.5Sn SHEET/PLATE ANNEALED AMS-4910
BAR ANNEALED AMS-4926, AMS-6900
TYPE II COMP B A-2   5Al-2.5Sn ELI SHEET/PLATE ANNEALED AMS-4909
BAR ANNEALED AMS-4924, AMS-6901
TYPE II COMP F A-4   8Al-1Mo-1V SHEET/PLATE ANNEALED AMS-4972, AMS-4915
SHEET/PLATE DUPLEX ANNEALED AMS-4916
BAR DUPLEX ANNEALED AMS-6910
ALPHA -BETA ALLOYS TYPE III COMP A AB-6   8MN     AMS-4908
TYPE III COMP C AB-1 GRADE 5 6Al-4V SHEET/PLATE ANNEALED AMS-4911
SOLUTION TREATED AMS-4903
STA AMS-4904
BAR ANNEALED AMS-4928, AMS-6931
STA AMS-6930
TYPE III COMP D AB-2   6Al-4V ELI SHEET/PLATE ANNEALED AMS-4907
BAR ANNEALED AMS-4930, AMS-6932
TYPE III COMP E AB-3   6Al-6V-2Sn SHEET/PLATE ANNEALED AMS-4918
SOLUTION TREATED AMS-4988
STA AMS-4990
BAR ANNEALED AMS-4978, AMS-4979, AMS-6936
STA AMS-3935
TYPE III COMP G AB-4   6Al-2Sn-4Zr-2Mo SHEET/PLATE DUPLEX ANNEALED AMS-4919
BAR DUPLEX ANNEALED AMS-4975, AMS-6905
  AB-5   3Al-2.5V SHEET/PLATE ANNEALED AMS-4989
TUBE   AMS-4943, AMS-4944, AMS-4945
BETA ALLOYS TYPE IV COMP A B-1   13V-11Cr-3Al SHEET/PLATE   AMS-4917
WIRE   AMS-4959
TYPE IV COMP C B-3   3Al-8V-6Cr-4Mo-4Zr SHEET/PLATE SOLUTION TREATED AMS-4939
BAR ST AMS-6920
BAR STA AMS-6921