Composite tooth with frustoconical insert

A composite tooth for working the ground or rocks, the tooth comprising:

• a ferrous alloy having a portion reinforced at least partially by an insert in the form of a hollow cone, the insert comprising an alternating macro-microstructure obtained by in situ reaction, wherein the alternating macro-microstructure comprises millimetric areas concentrated with micrometric globular particles of titanium carbides separated by millimetric areas substantially free of micrometric globular particles of titanium carbides;
• wherein the millimetric areas concentrated with micrometric globular particles of titanium carbides form a microstructure in which micrometric interstices between the globular particles are also filled by the ferrous alloy of the tooth, such that the ferrous alloy of the tooth is continuous between an interior of the hollow cone and an exterior of the hollow cone;
• and
• wherein the macro-microstructure of the insert is at least 2 mm from a distal surface of the tooth.