So many title themselves a leader of sorts. It's quite unbecoming. You don't become a leader after you get the title. You get the title because you are a leader first. Hence you don't need a title to be a leader.
A tell tell sign that you are not a person of influence is having to shout and remind those around you of your role. A leader has a positive impact on those around them laterally, above and below them. You effectively lead and have an impact and it's not your title that makes you effective - more efficient maybe but not effective.
Some of the most influential people do not have impressive titles. They have the right intent. They work in the best interest of the team. They bring solutions and people together and do not create divisions. They always stand up for the right thing and they are not afraid to push for and whomever for what is right. They make "it" happen. "It" being any kind of positive change that pushes forward progress.
No a title does not make you a leader. You have to be a leader at heart and intent first and then you will not care wether you get the title. An excellent resource for building leadership skills here.