Originally Posted by
merlinextraligh
A double daimond frame that is made up of two closed triangles presents different engineering issues than a fork, which is an open structure, not braced in 2 dimensions.
The argument makes about as much sense as saying if CF frames are so good, why do almost all bikes have steel spokes.
I think economics is the answer- Ti is tough to machine, & getting a performance fork shape out of it would be not worth the expense-
you don't see 'fully manipulated' tube shapes in those closed triangles either.