Reddit mentions of Glass Engineering Handbook

Sorry, just saw your reply this morning. These glasses are well understood. Check out USP type I and type III glasses. Read up on any resource online of glass types and additives.

If you're looking for specifically fatigue resistance of various glasses then that does exist. A quick google gave me this paper. More importantly though, glass like most materials is standardised. Corning (who invented pyrex) give a list of their glasses here. ASTM & USP codify lots of glass types with their mechanical properties. And of course there are several books on the topic of glass properties. This and This are great glass resources. And if you really want to go down the rabbit hole you could look into this sort of thing.

Most importantly though is to understand what we're talking about. Boron oxide is essentially a flux for glass. While arc international obviously believe it's not required in cooking applications, that doesn't mean that it doesn't improve glass performace in high/low temps, and there's absolutely no reason why it should significantly effect something like fatigue or fracture performance. From my perspective, it's similar to adding a bit of chromium to steel to improve corrosion performance, or putting a little citric acid in concrete to slow down the set. These are common tactics employed by engineers to get the performance they are looking for from a material.

>Forgive me for not assuming /r/cooking is made up entirely of mechanical engineers

That's alright, you're forgiven. I am one though if that helps at all. :)