Filter "get_terms" question

I am presently getting the information from a customized taxonomy utilizing this:

$phrases = get_terms(array(
    'taxonomy' => 'my_custom_taxonomy_name',
    'hide_empty' => true
));

Now, this returns lots of stuff in every WP_Term object; term_id, title, slug, term_group, term_taxonomy_id, taxonomy, description, mum or dad, rely and filter.

I solely have to get 2 of these: title and slug. How can I filter that question so it would not returns all that unused knowledge?