Austenite vs Austenitize - What's the difference?

As a noun austenite

is a solid solution or carbon or ferric carbide in iron that exists in steel at high temperatures.

to heat iron (or an iron-based metal such as steel) to a temperature at which it changes crystal structure from ferrite to austenite.

* Austenite

(wikipedia austenite) (en noun)

A solid solution or carbon or ferric carbide in iron that exists in steel at high temperatures

(austenitiz)

To heat iron (or an iron-based metal such as steel) to a temperature at which it changes crystal structure from ferrite to austenite.

* austenitization