Department change is a very common debate among IITians so let me state some important points regarding the same to answer your question in a better way.
Now if we roughly calculate 6-7 students from a textile branch out of 55 are eligible for branch change. The competition seems to be tough and you are required to maintain a certain CGPA to target a certain branch. The CG required to transfer to the following branches are
If you are confident that you can achieve the required CG with the given competition, you can take them risk. But hear me out, even if you don’t manage to do so, remember branches can be switched in MTech too. Moreover, doing BTech from IIT Delhi will only open more opportunities and won't become a disappointment.