Titanium

Titanium is the the ninth-most abundant element in the earth's crust (4400 ppm), and the fourth most abundant metal (after aluminum, iron and magnesium) so it is much more abundant than copper, which is the 26th most abundant element at 100 ppm.  However, it is very expensive to refine.

It is considered a strategic metal and is used in high-performance airplanes and submarines.  It has a high strength-to-weight ratio.  (Beryllium has a higher strength-to-weight ratio, but it is also much more expensive - over $200/lb, and it is also toxic.  Magnesium also is very strong, but it has a low melting point - only 1200 F).


Source:http://www.providentmetals.com

Titanium is one of the few non-precious metals (along with copper, nickel and tin) that is available in bullion form for investing.  A 1 kilogram bar costs about $80, and a 1 pound bar costs about $40.  Could titanium be an option for a wealthy investor who wants to diversify his portfolio? (Umm, no, at least not until prices stabilize).


Source: http://www.metalprices.com/p/TitaniumFreeChart

Spot prices for titanium are around $10/lb.  (6Al 4V means 6% aluminum, 4% vanadium, and it is the most commonly used titanium alloy. The aluminum makes it stronger and the vanadium makes it more ductile.)