Guild Wars 2

can i buy two tyrian ones and wear them or do i need to buy one tyrian and one tyrian and maguma because this mist rings work like normal ascended in pve where they are unique and cant wear two of same?

this type of question is a learned experience. most ppl had to learn the hard way^^

http://wiki.guildwars2.com/

Whether you can wear the same type of ascended item depends on whether they have a unique tag or not.
Check the gears description. If it says unique somewhere you can’t.
I don’t know if this has changed yet but if you have some ascended ring for example and a attuned ascended ring you can wear both even if they were the same item before.