Polycrystalline diamond elements and systems and methods for fabricating the same

Polycrystalline diamond, comprising:

• a working surface;
• a peripheral surface extending around an outer periphery of the working surface;
• a first volume comprising an interstitial material;
• and
• a second volume comprising a leached region that comprises boron and titanium, wherein the interstitial material of the first volume comprises at least one of boron, titanium, copper, chromium, molybdenum, cobalt, or tungsten, and wherein concentration of at least one of the boron or the titanium in the second volume increases along a direction from a portion of the second volume adjacent the first volume toward the working surface of the polycrystalline diamond.

Polycrystalline diamond, comprising:

• a working surface;
• a peripheral surface extending around an outer periphery of the working surface;
• a first volume comprising an interstitial material;
• and
• a second volume comprising a leached region that comprises boron and titanium, wherein the interstitial material of the first volume comprises at least one of BCo, BCo2, B2Co3, Co2B, Co23B6, Co3Ti, TiCo2, CoW2B2, Co21W2B6, WC, or TiC.

Polycrystalline diamond, comprising:

• a working surface;
• a peripheral surface extending around an outer periphery of the working surface;
• a first volume comprising an interstitial material;
• a second volume comprising a leached region that comprises one or more group 13 elements;
• and
• a boundary comprising one of:
• an arcuate boundary between the leached region and an unleached region, wherein the unleached region is disposed between the first volume and the leached region;
• a concave boundary between the second volume and the first volume;
• or
• an arcuate boundary between the second volume and the first volume.