Broz--coupla thing I wonder about...
Like you say, would be good to have a recoil lug.
Also, doesn't appear to be an extended rail design such as Glen Seekins of Seekins Precision
offers for 1/2 the cost. Maybe Glen could bead blast a rail for you and not anodize it so it would have the look you seem to want? I don't know. Might still save some $ and have a lighter setup with extended rail and lug.
I've heard from a Boeing eng. friend of mine that when they used titanium in planes and had to do drilling/machining the metal would have to be kept cool, or it would lose some of it's adventageous properties. Not sure if that is going on here, but it it is, it would certainly make the machining process more difficult and costly.
I've done a bit of research into titanium vs. 7000 series Aluminum (have to be very aware of the various alloys offered in each and their respective negs/pos/strengths, etc.) and have found that for what I was looking for, it was awfully hard to beat the 7000 series Aluminum for weight vs. strength vs. cost ratio--you could even take the cost out of the equation and it was still hard to beat 7000 series Al. For something that is machined to a specific dimension (vs. engineered to specific strength, for example) as Geargrinder said, Al will be lighter and 7000 series Al already beats out some steel alloys in strength.
For instance, titanium brakes may be lighter that SS brakes, but they won't be as light as 7000 series Al brakes...but I'm guessing smiths don't use Al for that due to it's low melting point.
I'll stop blathering now...