I want to become a college teacher. Is it compulsory to do B.Ed after B.Com or is there any other alternative?

For teaching profession, B.Ed is now compulsory.

B.Ed is a mandatory educational qualification requirement for seeking job of TGT and PGT teacher. In order to teach in college you may have to do Post graduate degree in your subject and clear NET.

B.Ed is not a qualification for a College Teacher. On the other hand, Ph.D. has become the most desirable qualification. In PG, a first class has become a qualification.

To teach in a college, you should better aspire for NET or Ph.D.

BEd is a mandatory educational qualification requirement for seeking job of TGT and PGT teacher. In order to teach in college you may have to do Post graduate degree in your subject and clear NET. You will have to do PhD also.