It broke, so he did not use it anymore.
(sry for bad grammar) originally trunks from the future came with a sword this was right after super saiyan and he killed frieza and way later in the middle/end of DBZ young trunks from the saved earth got his from tapion but the conundrum is that they wouldent of met tapion in the future when earth was destroyed so its a oxi-moron so there is no real evidence stateing he got his sword from the future from tapion but in the saved earth (present) he got his from tapion
When Mairi (future) Trunks came from the future in the trunks saga before Goku returns from Yardrat, Frieza lands on Earth and Mairi (future) Trunks went Super saiyan and sliced Frieza up with his sword and blew him to bits so he technically defeated Frieza. Goku didn't really succeed in defeating Frieza. Mairi (future) Trunks defeated someone not kid Trunks.
No, the sword trunks has is unexplained thruout the whole DB thing
No, Future Trunks is future Trunks. Broly is Broly
he doesnt future trunks comes back into the past
no future trunks is way stronger especailly in ssj2
Future Trunks would be stronger because just because trunks was a ssj at a younger age doesn't me he is stronger than future trunks.Besides you barely see trunks fight while future trunks always has a battle.
he got it from tapion
trunks
taibion gave the sword to him in the 13th movie
That would be a matter of opinion completely because future trunks has been fighting his whole life not for sport but for his life but on the other hand our time-line's trunks became a super saiyan years before future trunks.
Tapion gives Trunks his sword in the movie "Dragon Ball Z: Battle of Gods." After Trunks helps Tapion defeat the villain Hildegarn, Tapion presents the sword to him as a token of gratitude. The moment symbolizes the bond they formed during their battle and serves as a passing of strength from one warrior to another.