I like the subject matter of your post and will share my thoughts on it. Time can not be truly measured. You can sum time up as what is, what was and what will continue to be. Time just exists.
Life can be numbered. A cycle stemming from beginning to end but not time.
Traveling, involves something animate or inanimate moving across a distance. The distance is relative to mark of perception. Humans say this distance equals a ft, mile, yard etc.
"Time travel" already happens . It is humans who desire to reach the mark faster than their previous speed (another mark of perception).

so if one would ask "is it possible?" The answer most certainly is "Yes"
It can and will be increased...but time shall remain the same.