Looks to me like the black finish was painted on. Not sure about the "black oxide" coating, so here goes. First the substrate is a low carbon steel, maybe 1020-1040 alloy. Second the coating could be electro plated hard nickle (prefered). Next the other…

A big ditto to Hewitt's comments.  I had the same experience.  Titleist rep at demo day felt best driver for me was 910 D3 with Devotion 6 shaft but only had it in stiff.  He said a reg. would be best for me.  Can't justify spending the extra $$$ without…