Martin,

Someone posted this on MTB review "It is certain a type of steel alloy that includes a small amount of Niobium and Titanium in its chemical composition.
Its Tensile strength is very similar to that of cromoly; however, this type of steel claimed to retain 98% of this strength after TIG welding. CroMo, for example, can lose up to 20 to 30% of this strength due to exposure to intense heat. Nitanium is not the first attempt nor the last to market this type of steel tubing. Columbus (the Italian Steel tubing company) did a very similar thing years ago. In other words, IMHO, I would not choose a frame merely based on the fact that it uses the **new** tubings."

Your link states Nickel Titanium (which goes with the term NiTanium), the above states Niobium Titanium or NbTi.

Anyway, I enjoyed the link...
As I was reading, something occurred to me.....
Quick Facts...
* High performance and memory
* Made from special nickel titanium alloy
* Provides maximum spring and memory
* Minimizes fracturing
* Excellent for initial levelling and aligning
* Reacts to natural heat within patient's mouth
* Made from a special nickel titanium alloy that provides maximum spring and memory, while minimizing fracturing.

taking all of this into consideration, they seem to have renamed the material. It was originally called Nitinol50. Please check out http://www.nitinol.com specifically http://www.nitinol.com/4applications.htm
Looks like this is where the dental thinkgs came from.