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Titanium, Ti

Titanium, Ti
Categories: Metal; Nonferrous Metal; Titanium Alloy; Pure Element
Material Notes: CAS Number: 7440-32-6
This listing is for pure titanium. Although unalloyed titanium is not very useful for structural applications, titanium alloys are highly praised for their use in aerospace, high-temperature and biomedical applications. Titanium is difficult to machine or weld, but has significant advantages over traditional metals. For medical implants, titanium is considered one of the most biocompatible materials available, especially where direct contact to tissue or bone is required (i.e. endosseous dental implants or porous uncemented orthopedic implants). See the individual titanium alloy datasheets for specific applications.

A wide range of Ti alloys are listed in MatWeb. Titanium Grades 1,2,3,4,7,11,and 12 are all considered unalloyed. This listing is for 'pure' titanium.

Key Words: biomaterials, biomedical implants, biocompatibility

Physical Properties Metric English Comments
Density  4.50 g/cc 0.163 lb/in³
Molecular Weight  47.867 g/mol 47.867 g/mol
 
Chemical Properties Metric English Comments
Atomic Number  22 22
Thermal Neutron Cross Section  5.60 barns/atom 5.60 barns/atom
X-ray Absorption Edge  2.497 Å 2.497 Å K
  23.389 Å 23.389 Å LI
  26.831 Å 26.831 Å LII
  27.184 Å 27.184 Å LIII
Electrode Potential  0.200 V 0.200 V
Electronegativity  1.54 1.54 Pauling
Ionic Radius  0.680 Å 0.680 Å Crystal Ionic Radius for Valence +4
  0.760 Å 0.760 Å Crystal Ionic Radius for Valence +3
  0.940 Å 0.940 Å Crystal Ionic Radius for Valence +2
  0.960 Å 0.960 Å Crystal Ionic Radius for Valence +1
 
Mechanical Properties Metric English Comments
Hardness, Brinell  70 70 electrolytic Ti
Hardness, Vickers  60 60
Tensile Strength, Ultimate  220 MPa 31900 psi
Tensile Strength, Yield  140 MPa 20300 psi
Elongation at Break  54.0 % 54.0 %
Modulus of Elasticity  116 GPa 16800 ksi
Poissons Ratio  0.340 0.340
Shear Modulus  43.0 GPa 6240 ksi calculated
 
Electrical Properties Metric English Comments
Electrical Resistivity  0.0000554 ohm-cm 0.0000554 ohm-cm
Magnetic Susceptibility  0.00000125 0.00000125 cgs/g
Critical Magnetic Field Strength, Oersted  56.0 56.0
Critical Superconducting Temperature  0.360 - 0.440 K 0.360 - 0.440 K
 
Thermal Properties Metric English Comments
Heat of Fusion  435.4 J/g 187.3 BTU/lb
CTE, linear 8.90 µm/m-°C
@Temperature 20.0 - 100 °C
4.94 µin/in-°F
@Temperature 68.0 - 212 °F
  10.1 µm/m-°C
@Temperature 1000 °C
5.61 µin/in-°F
@Temperature 1830 °F
Specific Heat Capacity  0.528 J/g-°C 0.126 BTU/lb-°F
Thermal Conductivity  17.0 W/m-K 118 BTU-in/hr-ft²-°F
Melting Point  1650 - 1670 °C 3000 - 3040 °F
Boiling Point  3287 °C 5949 °F
 
Optical Properties Metric English Comments
Emissivity (0-1)  0.630 0.630 unoxidized; 650 nm
 
Component Elements Properties Metric English Comments
Titanium, Ti  100 % 100 %
 
Descriptive Properties
CAS Number 7440-32-6

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AMETi00 / 115
 




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