I think my use of quotation marks was quite correct in that context. Of course I was not quoting you, but pointing out that you should have used the word "titled". That is standard usage. I would not write "you should have used the word titled". Your comment implies my posting should have read "I think that should be titled in your first sentence" which is ambiguous and plain bad English. The fact that they are called "quotation marks" does not mean they necessarily have to be used for "quotations" that have been said in the past.