As your quote says, titanium has a higher strength to weight ratio. It's not necessarily stronger, and it's not necessarily "tougher" against the circumstanc

As your quote says, titanium has a higher strength to weight ratio. It's not necessarily stronger, and it's not necessarily "tougher" against the circumstances described than whatever type of iron they think it might be. The meteor isn't out to minimize weight. The strength to weight ratio isn't relavent here at all and does not make titanium more likely to survive until the object comes to rest on Earth.