Titanium is the ninth most abundant naturally occurring element in the Earth's crust and is usually found as a compound in igneous rocks, as well as any of the various sediments derived from them. It is also commercially used as an alloy with aluminum, iron, vanadium, and molybdenum due to its unusually high strength to density ratio. Two of the most useful natural properties of titanium are its resistance to corrosion, and its lightweight but high durability under stress. It is also one of the few metals that is non-toxic inside the human body and is regularly used for medical implants; such as joint replacements, and/or dental implants. And, it is also commonly used as an industrial and aerospace material, because of its lightweight, high tensile strength, and its low heat and ferrous magnetic conduction properties.
Since titanium is such an abundant metal it is rather easy to find for sale. Most industrial suppliers will offer high-grade titanium (over 90% purity) by the kilogram, but one can also find similar lesser amounts from commercial suppliers as well (typically in increments of standard ounces). However, even though titanium is very abundant, it is also a more expensive metal by weight, vis-a-vis most other commonly used industrial metals (such as aluminum, steel, iron, etc). This is because while it is a highly ductile metal, it is also a comparatively more difficult metal to work. Titanium, while strong, is a more brittle metal when exposed to blunt force striking. It also is not as easy to mold as most other metals, because of its low weight density. And, because of its high tensile strength its also much more labor extensive of metal to machine. For most of these reasons, it is commonly used as a strengthening alloy to other metals that are cheaper and easier with which to work. Once alloyed it becomes a much easier and reliable metal to work.
It is also possible to find scrap titanium for sale, though usually this type of titanium is already alloyed with other metals. While it is cheaper, depending on the quality of the titanium and/or any of the other with which it is alloyed, it could have slightly different properties than unalloyed titanium. For example, if it has been alloyed with higher amounts of iron it will lose some of its heat resistance, as its non-conductive magnetic properties. Depending on the intended use this could be a potential issue, or it might not. Therefore, it is important when buying titanium to know exactly which grade of titanium one needs. Most industrial and commercial sellers would be able to assist in answering these types of questions.
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