I was tired and ragged when I wrote this, and I didnt mean that "POLL" should be eliminated from your title, cause you're right. Without the upfront notification that THIS IS A POLL, a lot of people will just glide by it.
To change your poll title, go to your poll thread. At the top right side you'll see three little dots with an arrow to their right. Click on the arrow, and a pop-up window will appear, giving you the option to EDIT. Click on that, ad another long pop-up window will appear, which is where you can EDIT THE TITLE OF YOUR THREAD.
You can edit the body of your thread in the usual way, and for the usual period of time.