TABLE OF CONTENTS Hydrogen reduced TiO 2 is a brittle ceramic, but still much easier to handle than, for example, glass, no doubt in part because of the multiple internal defects. Such porous material is readily cut with a diamond saw, using water sparingly as a lubricant and coolant. Material can be drilled with diamond or silicon carbide drills, preferably at low speed and again using water sparingly. Monolithic Ti 4O 7 can safely be vaqua blast cleaned provided some background mechanical support is provided in the case of thin plate or tile. The material can be ground and polished for metallographic examination. The polished finish is an attractive black that might well find application in such fields as jewellery.
