Metallic titanium was first isolated in impure form in 1887 and with higher purity in 1910. However, it was not until the 1950's that it began to come into use as a structural material. This was initially stimulated by aircraft applications. Although the aerospace industry still provides the major market, titanium and titanium alloys are finding increasingly widespread use in other industries due to their many desirable properties. Notable among these is their low densities, which fall between those of aluminum and iron and give very attractive strength to weight ratios. In addition, titanium and titanium alloys readily form stable protective surface layers which give them excellent corrosion resistance in many environments, including oxidizing acids and chlorides, and good elevated temperature properties up to about 440°C (1022°F) in some cases.

GENERAL SPECIFICATIONS
ASTM B265	Plate and Sheet
ASTM B299	Sponge
ASTM B337	Pipe (Annealed, Seamless and Welded)
ASTM B338	Welded Tube
ASTM B348	Bar and Billet
ASTM B363	Fittings
ASTM B367	Castings
ASTM B381	Forgings
ASTM B862	Pipe (As welded, no anneal)
ASTM B863	Wire (Titanium and titanium alloy)
ASTM F1108	6Al-4V Castings for surgical implants
ASTM F1295	6Al-4V Niobium alloy for surgical implant applications
ASTM F1341	Unalloyed titanium wire for surgical implant applications
ASTM F136(e-1)	6Al-4V ELI alloy for surgical implant applications. Editorial changes were made throughout March 1994
ASTM F1472	6Al-4V for Surgical implant applications
ASTM F620	6Al-4V ELI Forgings for surgical implants
ASTM F67	Unalloyed titanium for surgical implant applications

TITANIUM GRADES
ASTM GRADE	ALLOY COMPOSITION	MINIMUM TENSILE (KSI)	MINIMIUM YIELD (KSI)	ELASTIC MODULUS (PSI-106)
1	Unalloyed Ti	35	25	14.9
2	Unalloyed Ti	50	40	14.9
3	Unalloyed Ti	65	55	14.9
4	Unalloyed Ti	80	70	15
5	Ti-6AI-4V	130	120	16.4
6	Ti-5Al-2.5Sn	120	115	16
7	Ti-0.15Pd	50	40	14.9
9	Ti-3Al-2.5V	90	70	13.1
10	Ti-11.5Mo-6Zr-4.5Sn	100	90	14.9
11	Ti-0.15Pd	35	25	14.9
12	Ti-0.3-Mo-0.8Ni	70	50	14.9
13	Ti-0.5Ni-0.05Ru	40	25	14.9
14	Ti-0.5Ni-0.05Ru	60	40	14.9
15	Ti-0.5Ni-0.05Ru	70	55	14.9
16	Ti-0.05Pd	50	40	14.9
17	Ti-0.05Pd	35	25	14.9
18	Ti-3Al-2.5V-0.05Pd	90	70	15.3
19	Ti-3Al-8V-6Cr-4Zr-4Mo	115	110	14.9
20	Ti-3Al-8V-6Cr-4Zr-4Mo-0.05Pd	115	110	14.9
21	Ti-15Mo-2.7Nb-3Al-0.25Si	115	110	14.9
23	Ti-6Al-4V ELI	115	110	16.3
24	Ti-6Al-4V-0.05Pd	130	120	16.4
25	Ti-6Al-4V-0.5Ni-0.05Pd	130	120	16.4
26	Ti-0.1Ru	50	40	14.9
27	Ti-0.1Ru	35	25	14.9
28	Ti-3Al-2.5V-0.1R	90	70	13.1
29	Ti-6Al-4V-0.1Ru	120	110	16.3

Examples: Titanium Gr 5 is Ti-6AI-4V
Titanium Gr 2 is known as commercially pure (CP Gr2)