Considering both were new additions to Legion with no existing lore that wouldn't have been an issue, they would have changed the artifacts to match spec identity (Talonclaw would be tweaked to gain the wolf companion and idk an ancient troll bow for surv, maybe one Sen'jin used, Vol'jin's father?)
Point being both Titanstrike and Talonclaw are made up in Legion so whatever spec identity BM/Surv would have had would be what their artifact would be changed into.