A method of producing a graphite-base filling material for the decomposition of alkali metal amalgams and containing between 69 and 35 weight percent of graphite and between 31 and 65 weight percent of titanium carbide, comprising forming a mixture at a temperature of about 100.degree. C containing a carbon filler in powder form, selected from the group consisting of petroleum coke, shale coke, and graphite, and in an amount ranging between 15 and 45.2 weight percent, a carbon-containing binding agent selected from the group consisting of coal pitch, petroleum pitch, and phenol-formaldehyde resin in an amount ranging between 18 and 30 weight percent, and a titanium substance selected from the group consisting of titanium, titanium carbide, and titanium oxide, said titanium substance being in the form of a powder having a particle size of about from 40 to 250 microns and being employed in an amount ranging between 24.8 and 52.0 weight percent based on the amount of titanium present, moulding the resulting mixture into blanks of a desired size and shape, firing the thus-moulded blanks at a temperature of about from 500.degree. to 1200.degree. C for a period of time between 30 and 400 hours, and graphitizing the resulting fired blanks at a temperature of about from 1700.degree. to 1800.degree. C for a period of time between 10 and 50 hours.