Hello

To get admission in any branch of IIT Tirupati for BTech at UG Level, you will have to give JEE Mains and qualify it then give JEE Advanced and score good ther to get a seat. For MSc courses you have to give IIT JAM exam and score a good rank in it to get a seat in any MSc course. For MTech courses you have to apply via your GATE score (if you are not from IIT itself, in this case you have to get above 8 cgp in BTech from IIT). You cannot apply with your AP PGECET rank.

For more detail syou can contact them at https://iittp.ac.in/contact-edit?start=130