I officially know more about wood chippers than I ever cared to. Also, heaven help me if anyone checks my search history right now. Yikes.
More on metal in woodchippers:
http://www.woodchipper.net/
Betcha didn't know such a site existed.
"The pieces of wood that are produced can be very big, and if thinly sliced metal is inserted, it is possible that they will be cut into slivers instead of chips."
"There are also bigger chipper styles used for processing whole trees, thus getting the nickname whole tree chippers or recyclers. They can handle materials between two to six feet in diameter, using employ drums, disks, or sometimes a combination of both. The largest machine, also known as tub grinders, can take on materials eight feet and larger in diameter. It is uses carbide tipped flail hammers to pulverize the material instead of just cutting it. The horsepower on this range between 200 to 1,000. Many of them can only be moved by semi-trailer trucks, being that they are so big and heavy. There are some smaller ones that can be pulled by average duty trucks."
I'm still not convinced titanium would be completely destroyed. I need to go back and look at some of the photos of Zahra to see if I can figure out the type she has and what it's made of. I'm just thinking there's a chunk of that metal nearby. Physics would make it easy to figure out approximately how far the debris could have gone. Well...easier, anyway.