鈦在地殼中的探明含量為 0.64%列居第九位，鈦是地殼中豐度高的元素之一。鈦的密度小，比強(qiáng)度高，耐腐蝕。鈦及鈦合金應(yīng)用廣泛,用于航空航天、石化、電力、海水淡化等領(lǐng)域。
① 工業(yè)純鈦
Fe C N H O
TA0 0.15 0.10 0.03 0.015 0.15
TA1 0.25 0.10 0.03 0.015 0.20
TA2 0.30 0.10 0.05 0.015 0.25
TA3 0.40 0.10 0.05 0.015 0.30
Gr1 0.20 0.10 0.03 0.015 0.18
Gr2 0.30 0.10 0.03 0.015 0.25
Gr3 0.30 0.10 0.05 0.015 0.35
Gr4 0.50 0.10 0.05 0.015 0.40
BT1-00 0.15 0.05 0.04 0.008 0.10
除焊絲外，允許Al≤0.30℅
BT1-0 0.25 0.07 0.04 0.010 0.20
允許 Al≤0.70℅
TA0ELI TA0-1 TA1ELI TA2ELI
TA3ELI
② 工業(yè)鈦合金—α及近α鈦合金
TA4 Ti-3Al
TA5 Ti-4Al-0.005B (Al:3.3-4.7%)
TA5-A TI-4Al-0.005B (AL:3.7-4.5%,船用鈦合金)
TA6 (BT5) Ti-5Al
TA7(Gr.7, BT5-1) Ti-5Al-2.5Sn （Al:4.0-6.0%）
TA7-D Ti-5Al-2.5Sn(Al:4.5-5.75%,ELI 適用于-155—-255℃)
TA8 Ti-5Al-2.5Sn-3Cu-1.5Zr(國標(biāo)中已刪除)
TA9 Ti-0.2Pa
TA10 Ti-0.3Mo-0.8Ni
TA11(Ti-811) Ti-8Al-1Mo-1V
TA12(Ti-55板) Ti-5.0Al-4.2Sn-2.0Zr-1.5Mo-0.25Si-1.0Nd
(Ti-55棒) Ti-5.4Al-4.2Sn-2.0Zr-1.0Mo-0.25Si-1.0Nd
TA13(Ti-230,IMI230) Ti-2.5Cu
TA14(Ti-679,IMI679) Ti-2.25Al-11Sn-5Zr-1Mo-0.25Si
TA15(BT20) Ti-6.5Al-1.5Zr-1Mo-1V
TA15-1(BT201CB) Ti-2.5Al-1.5Zr-1Mo-1V
TA15-2(BT202CB) Ti-4.0Al-1.5Zr-1Mo-1V
TA16(ПT-7M) Ti-2Al-2.5Zr
TA17(ПT-3B) Ti-4Al-2V
TA18(Gr.9) Ti-3Al-2.5V
TA19(Ti-6242S) Ti-6Al-2Sn-4Zr-2Mo-0.1Si
TA20(CПT-2) Ti-4Al-3V-1.5Zr
TA21(OT4-0) Ti-1Al-1Mn
②工業(yè)鈦合金——β及近β型鈦合金
TB1 Ti-3Al-8Mo-11Cr（國標(biāo)已刪除）
TB2 Ti-3Al-5Mo-5V-8Cr
TB3 Ti-3.5Al-10Mo-8V-1Fe
TB4 Ti-4Al-7Mo-10V-2Fe-1Zr
TB5(Ti-15-3-3-3) Ti-15V-3Cr-3Sn-3Al
TB6(Ti-1023) Ti-10V-2Fe-3Al
TB7(Ti-32Mo) Ti-32Mo
TB8(β-21S) Ti-15Mo-2.7Nb-3Al-0.2Si
TB9(βc ,Ti-38644） Ti-3Al-8V-6Cr-4Mo-4Zr （做鈦彈簧）
Ti-15-5-3 Ti-15Mo-5Zr-3Al
③ 工業(yè)鈦合金——（α＋β）鈦合金
TC1(OT4-1) Ti-2Al-1.5Mn
TC2(OT4) Ti-4Al-1.5Mn
TC3 Ti-5Al-4V
TC4(Gr.5 BT6) Ti-6Al-4V
TC5 Ti-5Al-2.5Cr
TC6(BT3-1) Ti-6Al-1.5Cr-2.5Mo-0.5Fe-0.3Si
TC7 Ti-6Al-0.6Cr-0.4Fe-0.4Si-0.01B
TC8 Ti-6.5Al-3.5Mo-0.25Si
TC9 Ti-6.5Al-3.5Mo-2.5Sn-0.3Si
TC10(Ti-662) Ti-6Al-6V-2Sn-0.5Cu-0.5Fe
TC11(BT9) Ti-6.5Al-3.5Mo-1.5Zr-0.3Si
TC12 Ti-5Al-4Mo-4Cr-2Zr-2Sn-1Nb
TC15(Ti-5Al-2.5Fe) Ti-5Al-2.5Fe
TC16(BT16) Ti-3Al-5Mo-4.5V
TC17(Ti-17) Ti-5Al-2Sn-2Zr-4Mo-4Cr
TC18(BT22) Ti-5Al-5Mo-5V-1Cr-1Fe
TC19(Ti-6246) Ti-6Al-2Sn-4Zr-6Mo
TC20(IMI367) Ti-6Al-7Nb
TC21(Ti-62222S) Ti-6Al-2Zr-2Mo-2Sn-2Cr-0.25Si
④其它尚未被命名的工業(yè)鈦合金
Ti-60 Ti-5.6Al-4.8Sn-2.0Zr-1.0Mo-0.35Si-0.85Nd
BT8 Ti-6.5Al-3.3Mo-0.3Si
BT18 Ti-7.7Al-11Zr-0.6Mo-1Nb
BT18y Ti-6.7Al-4.0Zr-2.5Sn-0.7Mo-1.0Nb-0.15Si
BT25 Ti-6.8Al-1.7Zr-2Sn-2Mo-0.7W-0.2Si
BT25y Ti-6.5Al-3.7Zr-1.7Sn-4.0Mo-1W-0.2Si
BT14 Ti-4.5Al-3Mo-1V
OT4-2 Ti-6Al-1.5Mn
Ti-3111 Ti-3Al-1V-1Mo-1Zr
Ti-70 Ti-2.5Al-2.0Zr-1Fe-0.1O
Ti-31 Ti-3Al-1Mo-1Ni-1Zr
Ti-75 Ti-3Al-2Mo-2Zr
Ti-80 Ti-6Al-3Nb-1Zr-1Mo
Ti-91 Ti-3.4Al-1V-1Fe-0.6Zr
Ti3Al Ti-12.8Al-31.1Nb-1.92Mo
SP-700 Ti-4.5Al-3V-2Mo-2Fe