Is the word "becoming" a present participle?

Yes it is a present principle , my reason being is because , it can be used like so : i'am becoming , becoming as in present ,

here are some examples below :
Becoming , entering , and going.

The word becoming is also an adjective , because it describes and gives an effect of attractive appearance ( what your are doing ).

The word becoming is also an Noun because it is any process of change.
( or changing) , so yes.

I really hope this helps,                     Answer = yes.