I am looking for info on Direct Metal 3D printer

[madmanmax]

LarryC, I need greater detail than could be achieved with a welder. my intention is to do things that would otherwise require casting.
The rest of you are all right about the flammability and explosive property of aluminum and titanium when oxygen is present.
Most printers for these materials use a sealed chamber filled with argon gas, therefor no oxygen and no fire potential.