A Title for a Content Marketing blog post is indeed very important. However, it is necessary to make sure that the title as well as the content of the blog/post are synchronised.
Time and again we come across blogs/posts that are just aimed towards grabbing the initial attention of a reader by having a catchy (and at times controversial) headliners. However, it is kind of anti-climatic if the reader (who is also a potential lead at this point since he has started reading the post) does not see any sync between the headline and the blog content.
That being said, content is equally important to the title.