I found this interesting particularly the last sentence (sound/feel)-
The forged 6-4 Titanium produces a very pleasingly solid yet soft feel at impact. Years of marketing hype in the golf industry have misled consumers into thinking that Beta titanium is a superior face material for titanium drivers. This is simply not true. 6-4 Titanium, while slightly less expensive than most Beta material, produces the same ball speeds only with a much better sound and feel.
