Hello Candidate

yes , you can do B.TECH after iti . In order to be eligible for pursuing B. Tech after ITI one must follow a proper plan. After the ITI course, the student can pursue a diploma course through lateral entry, which will take three years to complete. The second step is to sit for JEE Advanced after completing the Diploma course, after which the student is eligible to get admission in the IITs. If this method does not work, then students can use the lateral entry scheme in state engineering colleges.

To get the detailed information go through the link provided by career360

https://engineering.careers360.com/articles/b-tech-after-iti

Hope this information helps you.

GOOD LUCK!!