The topic of correcting grammar in a question has come up before, and there doesn't seem to be a clear consensus. Some argue that it's better to leave things how they are, to give an accurate representation of the asker's English ability, while others suggest that it's important to have correct grammar on a site that is attempting to help people improve their English.
I can see the case for both sides, but another consideration that doesn't seem to have been considered is particular errors that keep coming up over and over. I am choosing to focus on one particular error of this type, although I'm sure there are others.
It seems to be quite common , for non-native speakers to begin a question with "How to" even though it is incorrect in English. This is probably due to borrowing constructs from their native language.
Since it is such a common error1, it seems prudent to make the effort to correct it whenever possible, to aid learners in adopting the correct grammar.
Should there be a policy (or at least an encouragement) to edit question titles beginning with "How to" so that they use proper grammar?
1As of this writing, there are 3455 questions on ELL and Meta ELL with "how to" in the title, compared with 497 that use "how do I" or "how does one". Some of those may be false positives (e.g. "Can you tell me how to..."), but a quick perusal of the first few pages of results suggests that the vast majority are of the type discussed in this question.