Hi sajal

As far as CGPA is considered, you meet the minimum requirement stated by both the TUs. Also as you know, for selection, your overall profiles matters. I see you have mentioned 2 research papers. They would add a great value to your application if they are relevant to the Masters you are applying.

GRE is not mandatory for TU Berlin and most of the programs in TUM too.

You would need an IELTS score of minimum 6.5 or a TOEFL score of 88 for clearing language requirements.

You would need German language proficiency of atleast C1 level ( only if you are applying for a course with German taught modules). Also even for english taught programs, having a basic German proficiency of A2 level would greatly help in your application.

For TUM, they might conduct a further aptitude assessment depending on the strength of your application.

Your internships would add value only if they are relevant to your field of study (the Masters you are applying).

Apart from the above mentioned, Your Statement of Purpose (SOP) / Letter of Motivation and Letters of Recommendation would also have a key impact on your application. Make sure you describe well how your past experiences ( internships, research exp, any work exp) and the masters program you are going to undertake would help in your future goals.

I hope I was helpful to you. Remember again , your overall profile matters. Don't be discouraged if you fall short in any one of the aspects.

With research papers, internships, you are already ahead of several applicants. You have a good chance for any Masters degree relevant to Mechanical Engineering. Goodluck!