Is it possible to shift to other college after completing 1st year in B.Tech?

If you want to change your college after first year, It totally depends upon your college and that college in which you want to take admission in the second year. For that, you should contact both the colleges or university authorities.

College change or university change after first year is completely dependent on college and university norms, some university allow it and some won't plus you need to have good scores in first year to apply for the same. For further details, contact the college authorities.