Which MBA specialization is good to opt after completing B.Tech mechanical?

You can go for operational management or projects management.

All the streams offer ample of opportunities. There is no specific stream, which will help you to secure a job abroad. In the third year, rather than thinking about the stream, you should prepare for CAT. If you do well in MBA entrance exams like CAT, XAT, etc. you will have many options.

After completing B.Tech in Mechanical you have two option, either you can do MBA or you can do M.Tech in the relevant discipline. So, it is your choice about what do you want to pursue. If you want to open your choices to management then MBA is the best option otherwise M.Tech if you want to enhance

Hi, I would suggest you to go with marketing and operations. If you are a fresher then marketing is the field where you can grow more and B.Tech people are more preferred for operations and management.