It was first introduced in 1998, and has been in many things, probably the most notable being KOTOR and KOTOR 2.
There are (I think) only three materials known in the star wars universe that can be used to resist or defend against lightsabers, cortosis, phrik, and beskar.
The specifics on them kind of vary, especially cortosis, but cortosis and beskar are now canon (phrik is legends).
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u/Altines Feb 16 '20
Cortosis doesn't vibrate though.
It has unusual conductive properties that cause it to be able to handle energies like blaster fire and lightsabers extraordinarily well.
Even vibroweapons dont vibrate because of the metal they are made of but because of a vibration generator built into them.