The only real risk I can think of is that Ti is an -um metal. Aluminimum, magnisium, titanium, plutonium, they all burn when flaked/ribboned and provided with enough energy. So sayth my old college chem professor.
I can say I have lit magnesium and aluminum, but I doubt you will ever get that much off your spork and lighter without destroying a grinder in the process.
And I'm not going to speculate on Pu, other than to say you can't get me close enough to it find out.