If you can find a Titanium bat they were just gross and I believe they had some with the ASA stamp
Titanium is not always better as the following study shows:
"*In 1993 Easton, Worth and Louisville Slugger each introduced
titanium softball bats (Worth had kept theirs under wraps for several years because they knew it would radically change the game and only released it when Easton did). At the time titanium bats were introduced, the best single-wall aluminum bats were performing around 93-94mph, so when the titanium bats with batted-ball speeds between
100-103mph entered the game they made an immediate impact. In fact, titanium bats were so much hotter than anything else available that they were quickly banned by all governing organizations within three months of their introduction.
*Composite bats actually cover the entire range of performance. The early ones (which were not tested in this study) performed like an average single-walled aluminum bat. There is a group of recent composite models which compete in performance with the best double-walled aluminum slow-pitch softball bats, having batted-ball speeds between 96-100mph.
*And then there is a select group of super high performance composite slow-pitch softball bats, including the famous Miken Ultra, which are capable of producing batted ball speeds in excess of 105mph."
http://www.acs.psu.edu/drussell/bats/compalum.html
I think the people who used the titanium bats think they were so much better than the composite bats we use now is because they were so much better than the aluminum alternatives at the time, not to mention the balls used back then were much harder than what we use now.
