High temperature wire can withstand high kiln temperatures and still hold its shape during glass fusing processes. It is frequently fused between pieces of glass and is used as an attachment point for the glass.
It is used to hold objects in place during the fusing cycle. Fiber paper is quite often held in place with wire when it is applied to a circular mold shape.
Hi temp wire comes in a few different gauges and can withstand temperatures up to 2000 F.