Yes, but it was not pre-meditated, or carries out with sadism or overt perversion. If Titus did it, is it murder? Definitely. Is it ABSOLUTELY a murder that must be payed, through the application of the death penalty. Absolutely not. If Titus had killed her by putting poison in her drink, or slowly dismembering her to death, then it would be a case for the death penalty. Believe it or not, killing out of rage is something that anyone of us could do.
Was a toxicology report on the victim ever released? (Could they even perform one?) Surely we would need to know if there was any chance of an OD ... especially if Titus tries to use this in his defence?
And "poison" was just mentioned which falls under premeditated-murder. Interesting thoughts.