Government & private both colleges provide ITI courses as a vocational training to the students. The course duration could be from 6 months to 2 years, it depends upon the type & nature of the course. There are two type of ITI courses Engineering or Non Engineering courses. 

Engineering courses focus on concepts of engineering, Mathematics, Science and Technology. Non Engineering courses focus on soft skills, languages, and other sector-specific skills and knowledge. 

Some of the institutes are:

ITI Delhi

ITI Haryana

ITI Rajasthan etc.

The admission is based on the merit list through its entrance test.

Good Luck!