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    Titanium

    General Properties

    Symbol: Ti
    Number: 22
    Element Category:  Transition Metals

    Physical Properties

    Phase: Solid
    Std Atomic Weight: 47.867(1) g·mol−1
    Melting Temperature: 1941 K, 1668 °C, 3034 °F
    Boiling Point: 3560 K, 3287 °C, 5949 °F
    Crystal Structure: Hexagonal
    Electrical Resistivity: (20 °C) 0.420 µΩ·m
    Thermal Conductivity: (300 K) 21.9 W·m−1·K−1
    Thermal Expansion: (25 °C) 8.6 µm·m−1·K−1

    Application

    Titanium’s metallurgical characteristics makes it the metal of choice for many diverse applications including aerospace, industrial, chemical processing, marine, medical, sporting, and consumer goods. The original application for this metal was in the military aerospace industry specifically because of its efficiencies in structural qualities, a result of titanium’s strength and density. The density of titanium varies according to grade, and ranges from .160 lb/in3 to .175 lb/in3.
    Because titanium, when exposed to oxygen, creates a layer of ceramic like oxide film, it lends itself to applications where corrosion and erosion resistance are a concern. Should the metal get scratched, as long as it is exposed to oxygen, the scratch will reheal itself with the oxide film.
    Due to the biocompatibility of titanium, the metal is used extensively in the human body, as hip and knee implants, pacemaker cases, dental implants, and craniofacial plates to name a few specific medical applications.
    Other properties that make titanium a “metal of choice” is its unique “look”, the fact that it is nonmagnetic, has the ability to hold strength at high temperatures, and it has a relatively high melting point. Besides a high strength to weight ratio, corrosion resistance in many oxidizing environments including brackish and salt water and biocompatibility include its low modulus of elasticity which gives it flexibility and good thermal conductivity.
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