Y not? You can do.

You state norms for NIOS course is the way for Engineering after ITI.

Otherwise, you can join Diploma then Engineering in related courses. BTECH after ITI (https://www.iti50.com/p/after-iti.html)

Dear Gurpreet,

 You cannot take an admission for B.Tech after completing ITI. For that you need to do a diploma in engineering in the stream of your choice.After completing your diploma program you are eligeble to appear for JEE main. You have a possibility of securing a seat in either of the IITs or any good state engineering colleges for going ahead with B.Tech in the respective stream of your choice. 

Hope this helps

Good luck!