.........but forks of various designs, materials, and manufacturer get recalled on a pretty regular basis.

https://www.google.com/search?q=bicy...hrome&ie=UTF-8

This has been the case going back to the first alloy fork designs.

But it is quite possible that it is more related to the greater emphasis on
consumer safety and recalls in the era of alloy, carbon, and suspension
fork designs than to the materials involved..

In short, I don't know of any reliable data.

http://www.cervelo.com/en/support/recalls.html
http://velonews.competitor.com/2011/...reakage_161173
http://thebicycleplanet.com/articles...forks-pg56.htm
http://www.cpsc.gov/cpscpub/prerel/prhtml12/12149.html
http://www.cpsc.gov/cpscpub/prerel/prhtml12/12281.html