Correct form to tell and write the degrees I hold If I have a bachelor degree in Physics, how should I write it in a CV? 
What is the correct form between the two:


Bachelor of Physics
or
Bachelor in Physics?


The same thing goes for the master degree, right now I have written master of science in physics of materials, is this correct or should be better to just write master in  physics of materials?
If this is for formal use then state it exactly as it appears from your university and give any translation that is logically correct. But BS in Physics or BSc (Physics) or Bachelor of Science (Physics) or similar would all be universally recognized in the English speaking world. 

For informal usage (i.e. no legal implications whatever) then either of your suggestions would be fine or something such as I wrote above. 

For extremely formal situations, use what the university uses and let the reader translate it. Probably name the university, as well.