We HIGHLY recommend avoiding vaporizing materials on imported quartz or titanium, for the following reasons:
There is absolutely no oversight/restriction in regard to the quality and composition of materials used. If the material is contaminated, there is a chance that a toxic gas could be released when the nail is heated, through a process called sublimation.
While nothing has been medically-proven, we rather be safe than sorry and refuse to expose our customers, and their family and friends, to possible health risks. We highly suggest doing your own research and making an educated decision.