Yes, you can pursue Aerospace Engineering after completing a B.Sc. (Hons.) in Mathematics in India. However, there are a few key points to consider:

Options Available:

1. M.Tech./M.E. in Aerospace Engineering

You need to qualify GATE (Graduate Aptitude Test in Engineering) in a relevant paper (e.g., Engineering Sciences – XE, Mathematics – MA, or Aerospace Engineering – AE).

Some IITs, IISc, and other top institutes allow non-engineering graduates with strong mathematical backgrounds.

2. M.Sc./M.Tech. in Computational Mechanics or Fluid Dynamics

Some institutes offer related fields where mathematics plays a significant role in aerospace applications.

3. Direct Admission to Aerospace Engineering Courses Abroad

Many foreign universities accept a B.Sc. in Mathematics for M.S. programs in Aerospace Engineering with prerequisite courses.

Key Challenges:

1. Since B.Sc. Mathematics students lack core engineering subjects, you may need to take bridge courses in physics, mechanics, and engineering basics.
2. Some IITs/NITs may not accept B.Sc. grads directly for M.Tech. in Aerospace, so you have to check specific eligibility criteria first.