The term title is synonymous with the deed.  Do you have an unrecorded deed so that the last one is not on record at the Registry of Deeds?  If your grandmother signed the deed putting your name on it but did not record the deed or deliver it to you to record, then you have a problem.  In order to legally transfer title, your grandmother would have had to done more than sign a deed and put it in a drawer.  If you have an unrecorded deed, see an attorney to determine if you can file it at the Registry.  If not, the house will go through probate and with no will in place, the state statute on intestacy will determine who inherits the property.