Titanium (alloying?) of friction surfaces

[compress ignite]

The other night on the speed channel (I think) , they were disassembling a
horizontally opposed four cylinder (Vw, Subaru?) to be able to "Treat" the
camshaft,the crankshaft,the buckets[lifters?],the valve stems and a bunch of other friction surfaces with what they described as a Titanium alloying process
(sort of like Nitriding,as opposed to Coating).

Any one ever run across this?

I'll have to see if Kestas knows.