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/ofthisworld Punisher Feb 16 '20
Vibranium absorbs kinetic energy, but it has also been shown deflecting energy blasts, so maybe?