Read the abstract first
The abstract previews the entire article, makes it easier to judge whether it is relevant.
Titles can only tell you so much about the content of the article. The Abstract acts as a preview for the entire article, including the methods and results. By reading the Abstract first, you can get a better idea of what the article is actually about, if it relates to what you are researching, and whether it is worth your time to read the rest of it.